Cat Health:
Symptoms & Warning Signs
How to Recognize Signs of Illness in Cats and Know When to See a Vet
Recognizing cat health symptoms and warning signs begins with understanding your cat’s normal daily habits.
Cats cannot tell you when they feel sick, and early signs of illness may appear as subtle changes in appetite, drinking, litter-box use, grooming, activity, or behavior. Knowing what is normal makes it easier to notice when something has changed.
Your cat may eat less, drink more water, lose or gain weight, hide more often, or sleep longer than usual.
You might notice reduced interest in play, hesitation before jumping, difficulty chewing, or grooming changes that leave the coat dull or unkempt.
Vomiting, diarrhea, changes in urination, and reduced mobility can also signal a health concern.
Changes in everyday behavior can provide important clues about your cat’s health, even before obvious physical symptoms appear.
Not every isolated change indicates serious illness. What matters is how suddenly it begins, how severe it is, how long it lasts, and whether other symptoms occur alongside it. A noticeable increase in thirst deserves attention, especially when it accompanies weight loss or changes in urination.
Severe symptoms require immediate attention, regardless of how recently they began.
The CLJ approach starts with careful observation. Notice what has changed, look for related symptoms,
and consider possible health causes before attributing the change entirely to food preferences, stress, or aging.
Keeping track of when symptoms began and how they affect your cat’s routine helps you describe your concerns clearly to your veterinarian.
This guide explains common signs of illness in cats, when to contact your veterinarian, and which warning signs require urgent care. You will also find focused CLJ guides covering appetite loss, vomiting and diarrhea, increased thirst, urinary problems, weight changes, breathing difficulties, pain, mobility, and senior cat health, helping you find information that matches the changes you are seeing.
Quick Answer: What Cat Health Warning Signs Should You Watch For?
Watch for changes from your cat’s normal eating, drinking, litter-box habits, grooming, movement, and behavior. Early signs of illness in cats can be subtle. Hiding more often, eating less, grooming poorly, or hesitating before jumping may be signs of a health problem.
Key Cat Health Warning Signs
Appetite and thirst: Your cat refuses food, eats noticeably less, becomes unusually hungry, or drinks more water than usual.
Weight and digestion: Your cat loses or gains weight unexpectedly, vomits repeatedly, develops persistent diarrhea, or has difficulty passing stool.
Urination and litter-box habits: Your cat makes frequent trips to the box, strains, cries while urinating, passes blood, produces very little urine, or begins urinating outside the box.
Energy and behavior: Your cat becomes unusually tired, withdrawn, irritable, restless, confused, or less interested in normal activities.
Mouth and eating comfort: Your cat drools, drops food, struggles to chew, or paws at their mouth.
Skin, coat, and grooming: Your cat develops bald patches, sores, excessive scratching, an unkempt coat, or a noticeable change in grooming.
Movement, sleep, and appearance: Your cat limps, moves stiffly, struggles to jump, sleeps differently, or develops swelling, wounds, or other unexplained physical changes.
When to Contact Your Veterinarian
Contact your veterinarian about changes that are new and unexplained, persistent, recurring, or worsening. Describe when the symptoms began and how they affect your cat’s daily routine. Several changes occurring together increase concern, but a single severe symptom can also require immediate care.
Emergency Warning Signs: Seek Immediate Care
Do not wait to see whether symptoms improve if your cat has difficulty breathing, breathes with an open mouth, has pale or blue gums, cannot pass urine, or repeatedly strains without producing urine.
Collapse, seizures, severe trauma, extreme pain or distress, suspected poisoning, and severe or uncontrolled bleeding also require immediate veterinary attention. Contact a veterinarian or emergency veterinary hospital right away.
Start Here: What Is Your Cat Doing?
Choose the description that best matches the cat health symptom or behavior change you are noticing. Each CLJ guide explains what to observe, possible causes, and when to seek veterinary care. If several symptoms occur together, note each change so you can describe the full pattern to your veterinarian.
If your cat may be having an emergency, contact a veterinarian immediately. Reading a guide should not delay care.
My Cat Isn’t Eating or Is Eating Less
A change in appetite can involve refusing meals, eating smaller amounts, approaching food without eating, or struggling to chew.
Look at both how much your cat consumes and whether their eating behavior has changed.
Why Is My Cat Not Eating? Common Causes & When to Worry
My Cat Is Vomiting or Has Diarrhea
Start here if your cat is throwing up, passing loose stools, or experiencing recurring digestive changes.
Note how often it happens, when it began, and whether appetite, energy, or litter-box habits have also changed.
My Cat Is Suddenly Drinking More Water
If your cat visits the water bowl more often or you are refilling it more frequently, compare this with their usual drinking habits.
Also notice changes in urination, appetite, weight, and activity.
Why Is My Cat Drinking So Much Water?
My Cat Is Urinating Differently or Having Litter-Box Problems
Use this guide for changes such as urinating outside the box, making frequent trips, straining, crying, or producing different amounts of urine.
Consider possible health causes before treating a litter-box change as a behavior problem.
Litter Box & Urination Changes
My Cat Is Hiding, Lethargic, or Acting Differently
Increased hiding, reduced interest in play, unusual irritability, or a noticeable drop in energy can provide important clues.
These guides help you consider behavior changes alongside eating, drinking, grooming, movement, and other daily habits.
Energy Levels & Behavior Shifts
When Behavior Changes Signal a Health Problem in Cats
My Cat Is Losing or Gaining Weight
Start here if your cat looks thinner, feels heavier, or has an unexplained change in body condition.
Note whether the weight change occurs alongside increased hunger, reduced appetite, increased thirst, or lower activity.
My Cat Is Overweight
If your concern is excess weight, this guide focuses on food intake, portions, treats, activity, and planning gradual weight loss with veterinary guidance.
How to Help an Overweight Cat Lose Weight Safely
My Cat Is Having Trouble Breathing or Has Mouth or Gum Problems
This guide covers breathing changes as well as drooling, difficulty chewing, dropped food, and changes in gum appearance.
Use the emergency guidance above if your cat is struggling to breathe rather than continuing to read.
Breathing, Mouth & Gum Symptoms
My Cat Is Scratching, Losing Hair, or Has Coat Changes
Start here for excessive scratching, bald patches, sores, an unusually dull or greasy coat, or changes in grooming.
Notice where the changes appear and whether your cat is licking, scratching, or avoiding grooming particular areas.
My Cat Is Stiff, Having Trouble Jumping, or May Be in Pain
Hesitating before jumping, limping, avoiding stairs, changing resting places, or reacting differently to touch can help you identify changes in comfort and mobility.
Pain, Mobility & Posture Issues
I’m Not Sure Whether My Cat Needs a Veterinarian
Use this guide when you have noticed a change but are unsure what to do next. It explains how the severity, duration,
and combination of symptoms affect the need for veterinary attention.
When to Take Your Cat to the Vet
My Cat May Be Having an Emergency
If you suspect an emergency, contact your veterinarian or an emergency veterinary hospital immediately.
This guide outlines warning signs that require immediate care.
I’m Concerned About Changes in My Senior Cat
Start here for changes in your older cat’s appetite, weight, drinking, grooming, mobility, sleep, or behavior. The guide also covers ways to support everyday comfort, nutrition, and access to important resources as your cat ages.
Senior Cat Care: Health, Behavior, Nutrition & Comfort in the Golden Years
A Simple Way to Think About Cat Health Changes
Understanding cat health changes begins with comparing what you are seeing now with your cat’s usual daily habits. Consider when the change began, how it affects their routine, and whether other symptoms are appearing alongside it. Early signs of illness in cats can appear as subtle shifts in familiar patterns.
What Has Changed From My Cat’s Normal Routine?
Describe the change as clearly and specifically as possible. “My cat seems different” is a useful starting point, but “My cat is eating less, hiding after meals, and no longer jumping onto the couch” gives your veterinarian more information.
Pay attention to appetite, drinking, urination, bowel movements, grooming, sleep, activity, movement, breathing, and social behavior.
Describe what your cat is doing differently rather than guessing at the cause.
Did the Change Begin Suddenly or Develop Gradually?
Note when you first observed the change and whether it appeared suddenly or developed over days or weeks. Gradual changes can be easy to miss when you see your cat every day, so compare current habits with what they normally did before the change began.
Tell your veterinarian whether the change was sudden or gradual. Timing provides useful context, but severity and the symptoms involved also matter.
How Much Is It Affecting My Cat’s Daily Life?
Consider whether your cat can comfortably eat, drink, move, rest, and use the litter box. Notice whether they have stopped doing familiar activities, need more effort to complete them, or appear uncomfortable while doing them.
For example, record whether your cat hesitates before jumping, avoids the jump entirely, or attempts it but struggles.
These details help explain how the change affects everyday life.
Is It Continuing, Worsening, or Happening Again?
Track how often the change occurs and whether it is becoming more noticeable.
A single observation, a persistent symptom, and a recurring problem each provide different information.
Record when the change happens, how long it lasts, and whether your cat returns to their usual behavior between episodes.
Brief notes, photographs, or videos can help you describe observations that may be difficult to demonstrate during a veterinary appointment.
Are Other Changes Happening at the Same Time?
Look at the whole pattern. If your cat is drinking more water, also note their urination, appetite, weight, and energy.
If they stop jumping, observe their walking, grooming, resting places, and reaction to touch.
Record related changes even if you are unsure whether they are connected. Your veterinarian can assess their significance.
You do not need to identify a diagnosis. Your role is to notice and describe what has changed. The CLJ approach is simple: know your cat’s normal habits, watch for changes, and record the details. Clear observations help your veterinarian assess your concerns and advise you on the appropriate next step.
Appetite & Eating Changes
A change in your cat’s appetite can be an early warning sign of illness, pain, or stress.
Pay attention to how much your cat actually eats and how they behave around food.
Refusing meals, becoming unusually hungry, and struggling to chew are different patterns that provide useful information for veterinary assessment.
What Eating Changes Should You Watch For?
Your cat may refuse food, leave more of each meal unfinished, or eat noticeably less than usual.
Observe actual food intake rather than relying only on whether your cat visits the bowl.
Your cat may become unusually hungry, finish meals more quickly, or repeatedly seek food despite receiving their normal portions.
Note whether this increased hunger accompanies changes in weight, drinking, or urination.
Your cat may approach the bowl, sniff the food, and turn away without eating.
Describe this pattern to your veterinarian, including whether your cat attempts to eat but stops.
Your cat may drop food, chew mainly on one side, take longer to finish meals, or appear uncomfortable while chewing.
They may also begin accepting certain textures while avoiding foods they previously ate.
In multi-cat homes, observe each cat’s intake individually whenever possible.
Food disappearing from a shared bowl does not establish that every cat has eaten enough.
Notice whether one cat takes another’s food or prevents them from approaching the feeding area.
What Can Cause Appetite Changes in Cats?
Reduced appetite in cats can occur with dental disease, digestive illness, pain, infections, kidney disease, stress, and other conditions.
Changes in food, feeding location, or household routines may also influence eating.
The behavior you observe provides context, but it does not establish the cause.
Difficulty chewing, dropped food, and changes in food preferences can raise concerns about mouth discomfort.
A cat that appears interested in food but repeatedly turns away also needs attention rather than an automatic assumption that they dislike the meal.
Increased hunger deserves closer observation, particularly when your cat is losing weight despite eating.
Unusual hunger accompanied by weight loss, increased thirst, or changes in urination warrants veterinary assessment to investigate possible medical causes. Begging alone does not establish that your cat needs more calories.
When Should You Contact Your Veterinarian?
Contact your veterinarian if your cat stops eating, has a significant unexplained reduction in intake, appears uncomfortable while eating, or develops appetite changes alongside other symptoms. Do not assume that a substantial change is simply pickiness or a learned habit.
Record when the change began, approximately how much your cat consumes, and any accompanying changes in weight, energy, drinking, or litter-box habits. These observations help your veterinarian assess the problem and decide whether an examination or diagnostic testing is needed.
CLJ Guides
Vomiting, Diarrhea & Digestive Changes
Vomiting, diarrhea, constipation, and changes in stool appearance can provide important clues about your cat’s digestive health.
The significance of a digestive symptom depends on its severity, frequency, duration, and any accompanying changes.
Note what happens, how often it occurs, and whether your cat’s appetite, drinking, energy, or litter-box habits have also changed.
What Digestive Symptoms Should You Watch For?
Repeated vomiting, increasingly frequent episodes, or difficulty keeping food or water down warrants veterinary attention.
Record when your cat throws up, whether it happens near mealtimes, and how they behave afterward.
Recurring vomiting should not automatically be dismissed as hairballs.
Loose or watery stools, more frequent bowel movements, and accidents outside the litter box may indicate diarrhea.
Note whether the symptoms continue, return after improving, or include blood or mucus. These details help your veterinarian assess the problem.
Small, hard stools, repeated straining while defecating, or less frequent bowel movements may indicate constipation.
Describe changes in stool consistency, how often your cat passes stool, and whether they appear uncomfortable.
Straining in the litter box can be difficult to interpret. Observe whether your cat is passing stool, urine, or neither.
If your cat repeatedly strains without producing urine, seek immediate veterinary care. Do not assume the problem is constipation.
What Can Cause Vomiting and Diarrhea in Cats?
Vomiting and diarrhea in cats can occur with dietary changes, parasites, gastrointestinal disease, toxin exposure, an obstruction, or other medical conditions. The appearance of vomit or stool alone does not establish a diagnosis.
Tell your veterinarian whether symptoms began after a food change or possible access to plants, medications, string, spoiled food, or another unfamiliar substance. Include when the symptoms started and any related changes in appetite, activity, drinking, or elimination.
When Should You Contact Your Veterinarian?
Contact your veterinarian about repeated vomiting, persistent or recurring diarrhea, blood in vomit or stool, constipation, or repeated straining.
Digestive symptoms accompanied by reduced appetite, lethargy, pain, or changes in drinking also deserve prompt attention.
Keep a brief record of the number of episodes, your cat’s food and water intake, and whether they return to their normal behavior between episodes. Photographs of vomit or stool can help you describe what you observed. Recording symptoms supports veterinary assessment; it should not delay seeking care.
CLJ Guides
Litter-Box & Urination Changes
Changes in your cat’s litter-box habits can provide important clues about urinary health.
Urinating outside the litter box should not automatically be treated as a behavior problem.
Pay attention to where your cat urinates, how frequently they visit the box, how much urine they produce, and whether they appear uncomfortable.
What Urinary Changes Should You Watch For?
Your cat may begin urinating outside the litter box after consistently using it.
Record when the change began, where it happens, and whether you have also noticed changes in drinking, appetite, activity, or behavior.
Your cat may make frequent trips to the litter box but produce only small amounts of urine.
They may squat for longer than usual, strain, or cry while attempting to urinate.
Repeated attempts do not necessarily mean your cat is successfully emptying their bladder.
You may notice blood in the urine or a sudden increase or decrease in urine output.
Changes in the size or number of litter clumps can help you describe the pattern, although shared boxes make it harder to identify which cat is affected.
Observe individual cats when possible, but do not delay veterinary care while trying to collect more information.
What Can Cause Urination Changes in Cats?
Urination changes in cats can occur with bladder inflammation, urinary tract infection, crystals, kidney problems, and other medical conditions.
Litter-box cleanliness, box location, litter preferences, and household stress may also influence where your cat urinates.
Medical and environmental factors can occur together. A change in litter-box behavior alone does not establish the cause, and replacing the box or changing the litter does not rule out a health problem. Your veterinarian can assess the symptoms and determine whether testing is needed.
When Should You Seek Veterinary Care?
Contact your veterinarian about new or unexplained urinary changes, especially if your cat passes blood, appears uncomfortable, makes frequent trips to the box, or produces noticeably different amounts of urine.
Seek immediate veterinary care if your cat repeatedly strains without producing urine or appears unable to urinate.
This may indicate a urinary blockage, particularly in a male cat, and should be treated as an emergency.
Do not wait for the problem to improve or assume the straining is constipation.
Describe exactly what you have observed rather than simply saying your cat is “having litter-box problems.”
Details about when the change began, frequency, urine output, discomfort, and accompanying symptoms help your veterinarian assess the concern.
CLJ Guide
Why Is My Cat Drinking More Water?
A noticeable increase in your cat’s thirst can be a cat health warning sign, especially when it occurs alongside changes in urination, weight, appetite, or activity. Compare your cat’s current drinking habits with their usual pattern. Recognizing a change helps you identify a concern and describe it clearly to your veterinarian.
What Drinking Changes Should You Watch For?
Your cat may visit the water bowl more frequently, spend longer drinking, or begin seeking water from faucets, sinks, or other sources.
You may find yourself refilling the bowl more often, although spills, evaporation, and other pets can make water levels difficult to interpret.
Notice whether increased drinking accompanies more frequent urination or larger litter clumps.
Also record unexplained weight loss, increased hunger, reduced appetite, vomiting, diarrhea, or lower activity.
These observations provide useful context for veterinary assessment.
In multi-cat homes, observe individual cats when possible.
Food and water bowls shared by several cats make it harder to determine which cat’s habits have changed.
What Can Cause Increased Thirst in Cats?
Kidney disease, diabetes, hyperthyroidism, dehydration, and other medical conditions can affect thirst.
Your cat’s diet and environment also influence how much water they drink.
For example, a cat eating more dry food and less wet food may obtain less moisture from meals and drink more from the bowl.
Tell your veterinarian about recent food changes rather than assuming that diet fully explains a noticeable increase in thirst.
Increased thirst alone does not establish a diagnosis.
Record recent changes in food, medications, household conditions, or daily routine, and share them with your veterinarian.
When Should You Contact Your Veterinarian?
Contact your veterinarian if your cat is drinking noticeably more than usual without a clear explanation,
particularly if the change continues or accompanies increased urination, weight loss, appetite changes, or reduced energy.
Describe when the increased drinking began, how your cat’s habits have changed, and whether other symptoms are present.
A brief record of water consumption may help, but do not delay seeking veterinary guidance while trying to obtain an exact measurement.
CLJ Guide
Energy Levels & Behavior Changes
Changes in your cat’s energy, activity, or social behavior can provide important clues about their health.
Increased hiding, reduced interest in play, unusual irritability, and avoidance of familiar activities deserve attention.
Compare your cat’s current behavior with their usual habits rather than assuming the change reflects personality or age.
What Energy and Behavior Changes
Should You Watch For?
Your cat may spend more time hiding, withdraw from family members, or become less interested in play and exploration.
Notice whether they still come out for meals, approach you normally, and participate in familiar routines.
Your cat may sleep more than usual or spend less time moving around when awake.
Describe what “less active” means for your cat, such as no longer following you between rooms, climbing onto favorite furniture, or greeting you at feeding time. Note whether they attempt familiar activities but struggle or avoid them entirely.
Your cat may become irritable, react aggressively to touch, or suddenly seek more attention.
Record when these responses occur and whether they involve handling, movement, interactions with another pet, or a particular location.
Confusion, disorientation, restlessness, or difficulty navigating familiar spaces deserves veterinary attention.
Describe when the behavior began, how often it occurs, and what your cat does during each episode.
What Can Cause Behavior Changes in Cats?
Pain, illness, stress, neurological problems, age-related changes, and environmental disruption can affect feline behavior. Changes in household routines, relationships between pets, or access to food, water, litter boxes, and resting places may also influence activity and social interactions.
Medical and environmental factors can occur together. A recent household change provides useful context, but it does not rule out a health concern.
Consider possible health causes before treating a new behavior solely as a training or household problem.
An older cat’s reduced activity should not automatically be attributed to aging.
When Should You Contact Your Veterinarian?
Contact your veterinarian about cat behavior changes that are sudden, unexplained, persistent, worsening, or clearly unusual for your cat. Mention accompanying changes in appetite, weight, drinking, urination, grooming, or mobility so your veterinarian can assess the full pattern.
Describe specific observations rather than simply saying your cat is “acting strangely.”
Explain when the change began, which activities your cat now avoids, and whether they return to their usual behavior between episodes.
Brief notes or videos can help communicate changes that may not occur during the appointment.
CLJ Guides
Energy Levels & Behavior Shifts
Unexplained Weight Loss in Cats
A cat can lose weight while continuing to eat normally or becoming unusually hungry. A normal appetite does not rule out a health problem.
Unexplained weight loss in cats can occur with hyperthyroidism, diabetes, kidney disease, digestive disease, dental problems, cancer, and other chronic illnesses. Weight loss alone does not identify the cause; your veterinarian can assess the pattern and determine whether diagnostic testing is needed.
Notice whether your cat’s ribs, spine, or hips become more prominent, their body looks narrower, or they appear to lose muscle.
Record accompanying changes in appetite, drinking, urination, vomiting, bowel movements, activity, or grooming.
Contact your veterinarian about unexplained weight loss, even if your cat is still eating and behaving relatively normally.
Use a consistent weighing method to monitor changes. If you use a household scale, subtract your weight alone from your weight while holding your cat.
Small changes may be difficult to detect on these scales, so veterinary weight checks can provide more precise measurements.
When Your Cat Is Overweight
Excess weight can affect your cat’s health, mobility, comfort, and activity.
Safe weight management begins with understanding their actual food intake and assessing their body condition.
Review everything your cat consumes, including wet food, dry food, treats, table food, and food taken from other pets. Measure portions consistently and check the calorie information on food packaging. In multi-cat homes, observe individual meals to identify whether one cat eats more than their intended share.
Your cat’s activity, muscle condition, and existing health concerns also influence their nutritional needs. Do not suddenly cut portions in half or begin an aggressive diet. A feeding adjustment should support adequate nutrition while allowing gradual weight loss.
How Can You Help Your Cat Lose Weight Safely?
Develop a weight-loss plan with your veterinarian, especially if your cat is obese or has other health concerns.
The plan should establish an appropriate target weight, daily calorie intake, and schedule for checking progress.
Rapid or severe food restriction can be dangerous. If an overweight cat stops eating,
contact your veterinarian promptly rather than treating the lack of appetite as helpful weight loss.
Track food intake, body weight, and changes in movement, comfort, and activity. Follow-up checks help your veterinarian assess progress and adjust the plan. The goal is gradual weight loss that preserves nutrition, muscle, and everyday well-being.
CLJ Guides
Breathing, Mouth & Gum Symptoms
Changes in your cat’s breathing, gum color, or comfort while eating can provide important clues about their health.
Difficulty breathing requires immediate veterinary attention.
Mouth and dental symptoms also deserve assessment because discomfort can affect food intake, grooming, and everyday behavior.
What Breathing Changes Require Immediate Attention?
Your cat may breathe with an open mouth, gasp, or use noticeably more effort to breathe.
You may see pronounced movement of the chest or abdomen or notice that your cat struggles to settle comfortably.
If your cat gasps, breathes with an open mouth, or appears to struggle for breath, contact a veterinarian or emergency veterinary hospital immediately.
Do not wait for the symptoms to resolve on their own.
Unusually rapid breathing while resting also warrants prompt veterinary guidance, particularly if it continues or occurs with increased breathing effort.
Pale, white, or blue gums are serious warning signs, especially when accompanied by weakness, breathing difficulty, or collapse.
Seek immediate veterinary care rather than attempting to identify the cause at home.
What Mouth and Dental Symptoms
Should You Watch For?
Persistent bad breath, unusual drooling, and repeated pawing at the mouth can indicate an oral health concern.
Notice whether these changes occur alongside reduced appetite, changes in grooming, or discomfort during meals.
Your cat may struggle to chew, drop food, chew mainly on one side, or begin avoiding harder foods.
They may approach the bowl but stop after attempting to eat.
Interest in food does not establish that your cat can eat comfortably or consume enough.
Record when the symptoms began, which foods your cat accepts or avoids, and how much they actually eat.
Mention accompanying weight loss, appetite changes, reduced grooming, or irritability so your veterinarian can assess the full pattern.
When Should You Contact Your Veterinarian?
Arrange veterinary assessment for persistent bad breath, unusual drooling, mouth discomfort, or changes in chewing and food intake.
An examination can help determine whether dental disease or another oral problem is responsible.
If your cat stops eating or appears unable to eat comfortably, contact your veterinarian promptly.
Changing food textures may affect what your cat accepts, but it does not establish or resolve the underlying cause.
Breathing difficulty and pale, white, or blue gums should not wait for a scheduled dental appointment.
Treat these warning signs as a reason to seek immediate veterinary care.
CLJ Guide
Skin, Coat & Grooming Changes
Changes in your cat’s skin, coat, or grooming habits can provide important clues about their health and comfort.
Excessive scratching, bald patches, sores, greasy fur, and reduced grooming deserve attention.
Compare your cat’s current coat condition and grooming habits with their usual pattern.
What Skin and Coat Changes Should You Watch For?
Your cat may scratch more frequently, repeatedly lick or chew a particular area, or develop patches of thinning fur.
Notice whether the skin looks red, irritated, scabbed, or sore, and tell your veterinarian which areas are affected.
Your cat’s coat may become dull, greasy, matted, or less tidy than usual.
Record whether the change affects the entire coat or specific areas, such as the back, belly, or hindquarters.
Shedding may also become noticeably different. Describe whether you are finding more loose hair, seeing visible thinning, or noticing changes in the skin beneath the fur. These observations help distinguish increased shedding from areas of hair loss.
What Can Changes in Grooming Tell You?
Reduced grooming may leave loose hair, tangles, or mats in areas your cat previously maintained.
Notice whether your cat attempts to groom but struggles to reach certain places or spends less time grooming overall.
Excessive grooming may involve repeatedly licking, biting, or pulling at the fur.
Record which areas receive the most attention, whether hair loss or skin irritation develops, and whether the behavior interrupts resting, eating, or other activities.
Do not automatically assume excessive grooming is caused by stress or that reduced grooming is simply a sign of aging.
Describe the change without deciding on a cause before veterinary assessment.
What Can Cause Skin, Coat,
and Grooming Changes in Cats?
Parasites, allergies, skin disease, pain, stress, hormonal problems, and other conditions can affect your cat’s skin and coat.
Pain, reduced mobility, or illness may also interfere with their ability or willingness to groom.
The appearance of the coat alone does not establish a diagnosis.
Tell your veterinarian about recent changes in grooming products, medications, household conditions, or contact with other animals.
These details, together with your observations, help them assess possible causes and decide whether testing is needed.
When Should You Contact Your Veterinarian?
Contact your veterinarian about persistent scratching, bald patches, scabs, sores, recurring skin irritation, or a significant change in grooming.
Mention accompanying changes in appetite, weight, activity, movement, or behavior so they can assess the full pattern.
Record when the changes began and whether they are spreading or worsening.
Photographs can help document changes over time, but collecting observations should not delay veterinary guidance.
CLJ Guide
Pain, Mobility & Posture Changes
Signs of pain in cats can be subtle. Your cat may change how they move, rest, groom, or respond to touch without crying or visibly limping.
When your cat stops doing familiar activities or begins performing them differently, the change deserves attention.
Comparing these changes with their usual movement and posture helps you recognize and describe possible discomfort.
What Mobility and Posture Changes
Should You Watch For?
Your cat may hesitate before jumping, choose lower resting places, or stop climbing onto furniture they previously reached easily.
Notice whether they attempt the movement but struggle, pause before proceeding, or avoid it entirely.
Your cat may appear stiff after resting, move more slowly, avoid stairs, or spend less time exploring. Describe specific changes, such as difficulty getting up from a resting position or no longer following you between floors, rather than simply saying your cat is “slowing down.”
Your cat may stand, sit, or rest differently from usual.
Record when the posture change occurs and whether you notice it during movement, after resting, or while your cat uses the litter box.
Reduced grooming, an unkempt coat, and irritability when touched or picked up are also useful observations.
Notice your cat’s reactions during normal interactions rather than repeatedly touching an area that appears uncomfortable.
What Can Cause Pain and Mobility Problems in Cats?
Arthritis, injury, dental disease, and other medical conditions can cause pain.
Reduced movement may also reflect weakness or illness, so a change in activity alone does not establish the cause.
An older cat’s difficulty jumping or reduced grooming should not automatically be attributed to aging.
Consider health and comfort when your cat changes how they move, rest, or interact with familiar spaces.
Your veterinarian can assess these changes and determine whether an examination or diagnostic testing is needed.
When Should You Contact Your Veterinarian?
Contact your veterinarian about new, unexplained, persistent, or worsening changes in movement, posture, grooming, or responses to touch.
Mention accompanying changes in appetite, activity, sleep, or litter-box habits so they can assess the full pattern.
Explain when the change began, which movements have become difficult, and whether your cat behaves differently after resting.
Brief videos of ordinary walking or movement can help document changes that may not appear during the appointment.
Do not encourage difficult jumps or movements simply to demonstrate the problem.
Record what your cat does naturally, and do not delay veterinary guidance while gathering observations.
CLJ Guide
Senior Cat Health: What Changes as Cats Get Older?
Caring for a senior cat means paying attention to gradual changes as well as sudden symptoms.
Your older cat may change their activity, sleeping habits, or use of familiar spaces.
Age alone does not explain every change in health or behavior.
Compare current habits with your cat’s usual patterns and discuss unexplained changes with your veterinarian.
What Health Changes Should You
Watch For in Senior Cats?
Monitor your cat’s weight, body condition, and appetite. Notice whether they look thinner, lose muscle, gain excess weight, eat less, or become unusually hungry. Regular weight checks and recorded observations can make gradual changes easier to recognize.
Watch for increased drinking, changes in urination, and new litter-box difficulties. Describe whether your cat produces different amounts of urine, eliminates outside the box, or struggles to reach or enter it. Difficulty accessing the box and changes in elimination are distinct observations worth reporting.
Observe how your cat walks, jumps, climbs, and grooms. They may hesitate before jumping, choose lower resting places, avoid stairs, or leave areas of their coat unkempt. Record which activities have changed and whether your cat attempts them but struggles or avoids them entirely.
Pay attention to difficulty chewing, dropped food, unusual drooling, and persistent bad breath.
Also note changes in how your cat responds to sounds, navigates familiar rooms, or interacts with people and other pets.
Changes in sleep, restlessness, confusion, or disorientation also deserve attention.
Explain when these behaviors occur and whether they accompany changes in appetite, movement, or social interaction.
How Can You Make Everyday Life
Easier for an Older Cat?
Arrange essential resources so your senior cat can reach them comfortably.
A litter box with a lower entrance, accessible food and water, and comfortable resting places can reduce the effort required for daily activities.
Provide routes that require fewer difficult jumps. Notice whether slippery surfaces or another pet make it harder for your cat to reach a bowl, litter box, or preferred resting area. Keep resources near the places your cat uses while maintaining separation between feeding and toileting areas.
Home adjustments support everyday comfort, but a new mobility or health concern still needs veterinary assessment.
Observe whether the changes help and share any continuing difficulties with your veterinarian.
Does a Senior Cat Need Different Nutrition?
Senior cat nutrition should reflect your cat’s health, weight, muscle condition, appetite, and activity.
Age alone does not determine the most appropriate food or portion size.
Discuss feeding changes with your veterinarian, particularly if your cat loses weight, gains excess weight, eats less, or has a diagnosed medical condition. Record their actual intake, including treats and food taken from other pets, so feeding recommendations account for everything they consume.
When Should You Contact Your Veterinarian?
Contact your veterinarian about unexplained changes in your senior cat’s weight, appetite, drinking, urination, grooming, mobility, sleep, or behavior.
Report gradual changes as well as sudden ones.
Explain when the change began, whether it is worsening, and how it affects daily life.
Do not dismiss reduced activity, difficulty jumping, or poor grooming simply because your cat is older.
Clear observations help your veterinarian assess the concern and recommend appropriate care.
CLJ Guide
Senior Cat Care: Health, Behavior, Nutrition & Comfort in the Golden Years
When Should You
Take Your Cat to the Vet?
Knowing when to take your cat to the vet starts with recognizing changes in their usual health and behavior.
Consider how suddenly the symptoms began, how severe they are, whether they continue or recur, and how they affect everyday activities.
If you are unsure whether monitoring at home is appropriate, contact your veterinarian for guidance.
Which Changes Should You Discuss
With Your Veterinarian?
Contact your veterinarian about symptoms that are new and unexplained, persistent, worsening, or recurring after seeming to improve.
Describe when the change began, how often it happens, and whether your cat returns to their normal behavior between episodes.
Explain any changes in eating, drinking, urination, bowel movements, grooming, mobility, or social interaction.
Specific descriptions, such as eating smaller portions or avoiding stairs, provide more useful information than saying your cat simply seems unwell.
Report related symptoms together. If your cat is drinking more water and losing weight, mention both changes.
If they are less active and eating less, describe the entire pattern so your veterinarian can assess your concerns.
What If You Are Unsure Whether
Your Cat Needs an Appointment?
You do not need to identify a diagnosis before seeking veterinary advice.
A clear change from your cat’s normal routine is a reasonable reason to call, even if it does not appear on an emergency checklist.
Explain your observations and ask whether your cat needs a scheduled appointment, more urgent assessment, or monitoring with specific instructions
. If monitoring is recommended, ask what to watch for, when to provide an update, and which changes require further contact.
Knowing your cat’s usual habits helps you recognize a concern. Veterinary guidance helps determine the appropriate next step.
What Information Should You Provide?
Share when the symptoms began, how frequently they occur, and how they affect your cat’s daily life.
Mention recent changes in food, medications, household routines, or possible exposure to unfamiliar substances.
Brief notes, photographs, or videos can help document symptoms that may not occur during an appointment.
However, do not delay contacting your veterinarian while gathering a complete record. The observations you already have provide a useful starting point.
CLJ Guide
Emergency Symptoms in Cats
Some cat health warning signs require immediate veterinary care rather than monitoring at home. If your cat has difficulty breathing, cannot urinate, collapses, or develops another severe symptom, contact a veterinarian or emergency veterinary hospital immediately. Do not wait to see whether the problem improves.
Which Symptoms Require Immediate Veterinary Care?
A cat that struggles to breathe, breathes with an open mouth, gasps, or uses pronounced effort to draw each breath needs immediate veterinary care.
A cat that cannot pass urine or repeatedly strains without producing urine may have a life-threatening urinary blockage.
Seek immediate veterinary care rather than assuming the problem is constipation.
Collapse, inability to stand, seizures, and severe trauma also require immediate veterinary assessment.
Tell the veterinary team what happened, when the symptoms began, and whether your cat remains responsive.
Suspected poisoning requires immediate veterinary guidance, even if your cat has not developed obvious symptoms.
Describe the substance involved, the possible amount, and when exposure may have occurred.
Severe or uncontrolled bleeding, extreme pain or distress, and other rapidly worsening or potentially life-threatening symptoms also require emergency care. This list is not exhaustive. If your cat appears seriously unwell, seek veterinary guidance immediately.
What Should You Tell the Emergency Veterinary Team?
Describe the main symptom first, followed by when it began and whether it is worsening.
Mention any injury, suspected exposure, existing medical condition, or medication that may be relevant.
Ask for instructions about bringing your cat to the hospital and follow the veterinary team’s guidance.
Do not delay seeking care while collecting photographs, videos, or a complete symptom history.
CLJ Guide
Frequently Asked Questions
About Cat Health
How Can I Tell if My Cat Is Sick?
Look for changes in your cat’s usual appetite, drinking, urination, bowel movements, weight, activity, grooming, movement, breathing, or behavior.
A cat that eats less, hides more, stops jumping, or changes litter-box habits may be showing signs of a health concern.
A single observation does not establish a diagnosis. Consider when the change began, whether it continues or worsens, and whether other symptoms occur alongside it. Contact your veterinarian about unexplained changes rather than waiting for obvious signs of illness.
Do Cats Hide Pain and Illness?
Cats can show pain or illness through subtle changes rather than obvious crying or limping.
Reduced activity, increased hiding, poor grooming, irritability, appetite changes, and hesitation before jumping can all provide useful clues.
A cat that remains quiet or continues some familiar activities may still be uncomfortable.
Describe what your cat does differently rather than relying on vocalization alone to judge whether they are in pain.
When Should I Worry if My Cat Is Not Eating?
Contact your veterinarian promptly if your cat stops eating or consumes significantly less than usual.
Note whether they show no interest in food or approach the bowl but struggle to eat.
Mention vomiting, lethargy, weight loss, drooling, or difficulty chewing.
Do not assume that refusing food is simply pickiness, and do not treat an overweight cat’s loss of appetite as helpful weight loss.
Read the CLJ guide: Why Is My Cat Not Eating?
Is Vomiting Always Serious in Cats?
The significance of cat vomiting depends on its frequency, severity, duration, and accompanying symptoms.
An isolated episode does not identify the cause, and recurring vomiting should not automatically be dismissed as hairballs.
Contact your veterinarian about repeated vomiting, difficulty keeping food or water down, or vomiting accompanied by blood, appetite loss, lethargy, or discomfort. Report possible access to plants, medications, string, or other unfamiliar substances.
Read the CLJ guide: Why Is My Cat Throwing Up?
When Does Diarrhea in Cats Need Veterinary Attention?
Contact your veterinarian about diarrhea that persists, recurs, contains blood, or occurs alongside vomiting, reduced appetite, lethargy, or pain.
Describe stool consistency, the number of episodes, and whether your cat’s drinking or activity has changed.
Photographs can help document stool changes, but collecting information should not delay veterinary guidance.
Read the CLJ guide: Vomiting, Diarrhea & Digestive Issues
Why Is My Cat Drinking More Water?
Increased thirst in cats can occur with kidney disease, diabetes, hyperthyroidism, dehydration, and other conditions.
Changes in food can also influence how much water your cat drinks separately from meals.
Compare current drinking with your cat’s usual pattern. Contact your veterinarian about a noticeable unexplained increase,
especially when it accompanies increased urination, weight loss, appetite changes, or reduced energy.
Read the CLJ guide: Why Is My Cat Drinking So Much Water?
Are Litter-Box Changes a Behavior Problem
or a Health Problem?
Litter-box changes can involve medical conditions, environmental factors, or both.
Box cleanliness, location, litter preferences, and household stress may influence use, but they do not rule out a health concern.
Report frequent trips, straining, crying, blood in the urine, or changes in urine output.
If your cat repeatedly strains without producing urine or appears unable to urinate, seek immediate veterinary care.
Do not assume the problem is constipation.
Read the CLJ guide: Litter Box & Urination Changes
Why Is My Cat Losing Weight Even Though
They Are Eating?
A normal or increased appetite does not rule out illness.
Unexplained weight loss can occur with several medical conditions, and weight loss alone does not establish which condition is responsible.
Arrange veterinary assessment and report changes in thirst, urination, appetite, digestion, or activity. Consistent weight checks can help document the trend.
Read the CLJ guide: Weight Changes in Cats
Can Sudden Behavior Changes Mean My Cat Is Unwell?
Pain, illness, stress, and environmental changes can affect feline behavior. Increased hiding, unusual aggression, reduced interest in play,
or sudden changes in social interaction deserve attention when they differ from your cat’s normal habits.
Consider possible health causes before treating the change solely as a behavior problem.
Tell your veterinarian about accompanying changes in eating, drinking, grooming, mobility, or litter-box use.
Read the CLJ guide: When Behavior Changes Signal a Health Problem in Cats
Does Difficulty Jumping Mean My Cat Is in Pain?
Difficulty jumping can reflect pain, weakness, or reduced mobility, but the behavior alone does not identify the cause.
Notice whether your cat hesitates, attempts the jump but struggles, or chooses lower resting places.
Report new or worsening movement changes to your veterinarian.
Do not encourage difficult jumps to demonstrate the problem; a video of ordinary movement may be more useful.
Read the CLJ guide: Pain, Mobility & Posture Issues
Why Has My Cat Stopped Grooming or Started Grooming Excessively?
Reduced grooming can occur when discomfort, illness, or limited mobility interferes with normal coat care.
Excessive licking, chewing, or pulling at fur can occur with irritation, parasites, allergies, pain, or stress.
Do not automatically attribute grooming changes to age or anxiety.
Contact your veterinarian about significant changes, especially when bald patches, sores, mats, or skin irritation develop.
Read the CLJ guide: Skin, Coat & Physical Changes
Are Health and Behavior Changes Normal
in Senior Cats?
An older cat may need adjustments to daily routines and access to resources, but age does not explain every change.
Weight loss, increased thirst, poor grooming, difficulty moving, confusion, and appetite changes deserve assessment.
Report gradual changes as well as sudden symptoms. Accessible litter boxes, comfortable resting places, and easier routes around the home can support comfort while your veterinarian assesses health concerns.
Read the CLJ guide: Senior Cat Care
How Do I Know Whether My Cat Needs a Vet?
Consider how sudden, severe, persistent, recurring, or unusual the change is and whether it affects normal daily activities.
You do not need a diagnosis before calling your veterinarian.
Describe what you have observed and ask whether your cat needs an appointment, urgent assessment, or monitoring with specific instructions.
If monitoring is advised, ask which changes should prompt another call.
Read the CLJ guide: When to Take Your Cat to the Vet
What Symptoms Are Emergencies in Cats?
Difficulty breathing, open-mouth breathing, inability to urinate, collapse, inability to stand, seizures, severe trauma, suspected poisoning,
uncontrolled bleeding, and extreme pain or distress require immediate veterinary attention.
Contact a veterinarian or emergency veterinary hospital immediately rather than waiting for improvement.
This list is not exhaustive, so seek guidance whenever your cat appears seriously unwell.
CLJ Takeaway
Recognizing cat health symptoms and warning signs begins with knowing what is normal for your cat. Health concerns may first appear as changes in appetite, drinking, weight, grooming, movement, sleep, behavior, or litter-box habits rather than an obvious emergency.
A cat that eats less, drinks more water, hides more often, stops jumping, or leaves their coat unkempt may be showing signs of discomfort or illness.
Do not automatically dismiss these changes as pickiness, personality, or aging.
Notice when they began, whether they continue or worsen, and whether other symptoms occur alongside them.
You do not need to diagnose the problem before seeking help.
Contact your veterinarian about new, unexplained, persistent, recurring, or unusual changes, and seek immediate care for emergency symptoms.
Clear observations about your cat’s daily habits help your veterinarian assess the concern and recommend the appropriate next step.
The CLJ approach is to know your cat’s normal patterns, recognize meaningful changes, and seek veterinary guidance when concerns arise.
Updated: October 2026
Educational Note: Cat Lovers Junction provides educational information and does not replace veterinary diagnosis or treatment. Contact your veterinarian whenever you are concerned about a change in your cat's health, behavior, appetite, weight, mobility, or other normal patterns.
Sharing our love and knowledge about cats.
© 2026. All rights reserved.