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Signs Your Cat May Be Sick

Is there something strange about your cat?

Cats are extremely gentle and subtle animals, and this also applies to their health. Because felines are good at hiding symptoms, they may go undetected for quite a while. Unfortunately, cats hide serious diseases too.

Not infrequently, it is not until things get worse that you spot the problem. If that is the case, it may be too late. Experienced cat owners and experts have knowledge about behavioral and physiological signs of underlying disorders. If you see any of the following symptoms in your cat, it is high time to take measures.


If your cat has been with you for quite a while, you can pretty much foresee your pet’s behavior. Changes can signify a disorder. For example, sudden and continuous outbursts of activity may result from excess of thyroid hormones. Lack of activity may be a sign of various illnesses: diabetes, hypothyroidism, arthritis, kidney problems, etc.

Unstable sleep

Cats develop individual sleep patterns, and experienced cat owners know when their cats go to rest. If you see that your cat sleeps during time when it used to be active, or, vice versa, becomes overactive when it used to sleep, it is advisable to call a veterinarian.


Foul breath

Bad breath can be caused by dental and kidney issues. Sweet breath is no sweet sign at all: it can signify diabetes.

Changes in litterbox activity

You know your cat’s litterbox behavior, and you clean it regularly. Litterbox activity provides a clear picture of your cat’s overall health. Sudden changes like frequent urination/defecation or lack of it indicate a problem. See a vet if your cat gets vocal when using the litterbox, there is blood in urine and feces, or your cat eliminates elsewhere. These may be signs of serious renal and intestinal diseases, such as cystitis, inflammation, tumors, etc.


Cats have a knack for keeping their fur in shape. If your cat has stopped grooming, this may be due to impeded movements resulting from musculoskeletal issues. Lack of grooming can result in matted hair. Sometimes things get so serious that there is no choice but to cut them off. Also, grooming issues may occur due to skin infections, parasites, and allergies.

Changes in appetite

If something goes wrong with a cat’s health, it may either stop eating or suddenly begin to eat too much. The former can be caused by various intestinal issues and kidney failure. The latter may result from hyperthyroidism or diabetes.

Weight changes

A sudden weight gain can indicate a metabolic disorder. Weight loss may result from thyroid disease, parasites, infections, cancer, etc.

Vocalization changes

If a usually quiet cat purrs and meows too much for a long time, or, vice versa, a ‘talkative’ cat keeps silent, most likely, the cat is dealing with a problem.


These are only a few common signs of cats’ feeling bad. Please, do not rely on these signs alone. Any health issue requires professional assistance! If you suspect that your cat has a health disorder, call your local vet service immediately and put your pet to examination.

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