8 Of The Most Common Cat Diseases

Nov 13, 2025byMichael Tremblay

Cats are wonderful companions, but like all pets, they can face health challenges throughout their lives. Understanding the most frequent illnesses your feline friend might encounter helps you spot warning signs early and seek proper veterinary care. Being informed means you can provide the best possible life for your furry family member.

This article is for informational purposes only and should not replace professional veterinary advice. Always consult your veterinarian if you suspect your cat is unwell.

1. Feline Lower Urinary Tract Disease

Feline Lower Urinary Tract Disease
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Bladder problems affect countless cats each year, causing painful urination and frequent trips to the litter box. Your cat might strain without producing much urine, or you may notice blood in their waste.

Male cats face higher risks of blockages, which become life threatening emergencies. Proper hydration and diet changes often help manage symptoms effectively.

2. Chronic Kidney Disease

Chronic Kidney Disease
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Older cats commonly develop kidney problems that gradually reduce organ function over time. Weight loss, increased thirst, and more frequent urination signal that something might be wrong.

While there is no cure, special diets and medications can slow progression considerably. Regular veterinary checkups catch kidney issues before they become severe.

3. Diabetes Mellitus

Diabetes Mellitus
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Just like humans, cats can develop diabetes when their bodies cannot properly regulate blood sugar levels. Overweight cats face greater risks, though any feline can develop this condition.

Excessive drinking, urination, and appetite changes are telltale signs. With insulin injections and dietary management, many diabetic cats live long, happy lives.

4. Hyperthyroidism

Hyperthyroidism
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An overactive thyroid gland causes metabolism to speed up dramatically in affected cats. You might notice sudden weight loss despite your cat eating ravenously, along with hyperactive behaviour and restlessness.

This condition typically affects middle aged and senior cats. Medication, radioactive iodine therapy, or surgery can successfully control hyperthyroidism.

5. Upper Respiratory Infections

Upper Respiratory Infections
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Cat colds spread easily, especially in shelters or multi cat households where viruses pass quickly between animals. Sneezing, runny nose, and watery eyes make your cat miserable, much like human flu symptoms.

Most infections clear up within weeks with supportive care. Vaccinations help prevent the most serious respiratory viruses.

6. Dental Disease

Dental Disease
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Tartar buildup and gum inflammation plague many cats, leading to painful mouths and tooth loss if untreated. Bad breath often serves as the first warning sign that dental problems are developing.

Professional cleanings and daily tooth brushing prevent serious complications. Dental disease can even affect heart and kidney health over time.

7. Feline Immunodeficiency Virus

Feline Immunodeficiency Virus
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FIV weakens the immune system, making cats vulnerable to infections they would normally fight off easily. Bite wounds from cat fights spread this virus, so outdoor cats face higher exposure risks.

Infected cats can live quality lives for years with proper indoor care and regular veterinary monitoring to catch infections early.

8. Cancer

Cancer
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Various cancers affect cats, with lymphoma being among the most common types diagnosed. Unexplained lumps, sudden weight loss, or changes in eating habits warrant immediate veterinary examination.

Early detection dramatically improves treatment outcomes. Chemotherapy, surgery, and radiation offer hope, with many cats responding well to cancer treatments when caught promptly.

Michael Tremblay
byMichael Tremblay

A nature enthusiast from Montreal with a background in wildlife photography. Michael writes about wildlife, conservation efforts, and the beauty of animals in their natural habitats.