Cats are masters at hiding illness. By the time most owners notice something is wrong, the problem has been building for weeks. A weekly health check takes under five minutes and catches the kind of changes — subtle weight loss, early dental disease, coat dullness — that are cheap to address when found early and expensive when found late. This checklist gives you a consistent framework to spot problems before they become emergencies.
Weekly Physical Checks You Can Do at Home
The best time to do a health check is during a calm petting session, when your cat is relaxed. Work from head to tail so you don't miss anything. Start with the eyes — they should be clear and bright with no discharge, cloudiness, or persistent third eyelid showing. A little sleep crust in the corner is normal; yellow or green discharge is not.
Check the ears next. Healthy cat ears are pale pink inside, with no odor and minimal wax. Dark brown crumbly debris, a musty smell, or frequent head shaking points to ear mites or a yeast infection — both treatable early, both uncomfortable if left alone. Vet tip: Use a cotton ball moistened with an ear cleaner like Virbac Epi-Otic for routine maintenance, but never push anything into the ear canal.
Run your hands along your cat's spine and ribs. On a healthy cat, you should feel the ribs easily without having to press hard — they're there, but covered by a thin layer of fat. If you can count each rib from a foot away, the cat is underweight. If you can't feel them at all, they're overweight. Track this weekly — gradual weight loss is one of the first signs of hyperthyroidism and kidney disease in cats over 8.
Litter Box Monitoring
Your cat's litter box is one of the most reliable health monitors you have, and it only works if you're paying attention when you scoop. Normal output for an adult cat is one to two clumped urine balls per day and one bowel movement. Significantly more or less than that, over two or more consecutive days, warrants attention.
Straining without producing anything — in urine or stool — is always a vet call, not a wait-and-see situation. Male cats especially are prone to urinary blockages, which can become fatal within 24–48 hours. Blood in the urine turns the clumped litter pink or red. Soft, unformed stool occasionally is usually dietary; persistent diarrhea beyond 48 hours needs a vet visit.
Warning: If your cat visits the litter box repeatedly in a short period without producing urine, treat it as an emergency. Urinary obstruction is one of the most common causes of sudden death in male cats and requires immediate veterinary care.
Eating and Drinking Habits
Changes in appetite are meaningful. A cat that suddenly eats dramatically more without gaining weight, or less without an obvious cause like stress or a diet change, needs a vet visit. Increased thirst paired with increased urination is a classic sign of diabetes or early kidney disease — two conditions that are manageable when caught early and very difficult to manage late.
Most adult cats need 200–280 calories per day. If you're free-feeding dry food, you have almost no way of knowing how much your cat is eating day-to-day. Measured twice-daily meals give you a meaningful baseline. Purina Pro Plan and Royal Canin both publish feeding guides by weight on their packaging — use those as your starting point and adjust based on your vet's guidance.
Water intake is easy to underestimate because cats are naturally low-thirst animals. A cat drinking water frequently — especially if they weren't before — is telling you something. A cat water fountain like the Drinkwell Pagoda or Catit Flower Fountain (both on Chewy and Amazon) encourages consistent hydration and makes it easier to notice when intake spikes.
Behavior and Mental Health Markers
Behavior changes are often the first symptom of something physical. A cat that suddenly hides more, stops jumping onto furniture they used to love, or becomes aggressive when touched in a specific spot is likely in pain. Cats rarely vocalize pain directly — they withdraw from it instead.
Over-grooming to the point of bald patches, or the opposite — a suddenly unkempt coat from a cat that was previously fastidious — both signal a problem. The former is usually stress or allergies; the latter is often pain (the cat can't bend comfortably to groom) or illness. Either way, a vet check is warranted if it persists for more than a week.
Sudden aggression in a previously calm cat, especially when touched near the tail base or abdomen, can indicate pain from arthritis, a urinary issue, or an injury. Don't attribute it to "attitude" without ruling out a physical cause first. If you're regularly dealing with a cat that's reactive or difficult to handle, our guide on handling a difficult cat covers both behavioral and pain-related causes.
Monthly and Seasonal Tasks
Beyond weekly checks, some tasks belong on a monthly or seasonal schedule. Nail trims every 3–4 weeks prevent overgrowth that curls into the paw pad — a painful and completely avoidable problem. Use a proper cat nail clipper like the Zen Clipper or Safari Cat Nail Trimmer; human nail clippers crush the nail rather than cutting cleanly.
Brush long-haired cats like Persians and Maine Coons at least twice weekly to prevent mats. Short-haired breeds — Siamese, Burmese, British Shorthair — need a once-weekly brush to reduce shedding and hairballs. A Furminator deShedding Tool works well for both coat types and noticeably reduces the amount of fur deposited on furniture.
Check flea and tick preventative status monthly. Even strictly indoor cats need consistent coverage. Seasonally — usually spring and autumn — schedule a vet visit if your cat is over 8 years old, as senior cats benefit from biannual bloodwork to catch the kidney, thyroid, and liver changes that come with age. For a full overview of what to track at each life stage, the Pretty Happy Pets cat care library has age-specific guides.
Frequently Asked Questions
How do I know if my cat is in pain?
Cats rarely cry out in pain. Watch instead for hiding, reduced grooming, reluctance to jump, flattened ears, a hunched posture, or aggression when a specific area is touched. Any sudden behavioral change in a cat with no obvious external cause should be evaluated by a vet, particularly in cats over 7.
How often should I weigh my cat at home?
Monthly is enough for healthy adult cats. Pick the same time of day each month, ideally before a meal. A kitchen scale works — weigh yourself holding the cat, then weigh yourself alone and subtract. A loss of more than half a pound in a month without a diet change is worth a vet call.
What's a normal resting respiratory rate for a cat?
Between 15 and 30 breaths per minute when completely relaxed and sleeping. Count chest rises for 30 seconds and double it. Consistently above 30 at rest can indicate heart or respiratory disease and should be checked promptly. Many cardiologists now recommend tracking this weekly for cats with known heart conditions.
When should routine vet checks increase from annual to twice-yearly?
At age 10 for most cats, or earlier if your cat has a diagnosed condition like kidney disease, hyperthyroidism, or heart disease. Cats age roughly four times faster than humans after reaching adulthood — a lot can change in six months.
Final Thoughts
A five-minute weekly check is one of the highest-return habits a cat owner can build. Most of what makes a vet visit expensive is catching something late. The owners who consistently do well by their cats aren't necessarily spending more — they're just paying attention to the right things, regularly.
