Cat Health Guide: Signs Your Cat Is Healthy and When to See a Vet

Cats are obligate carnivores — a biological fact that fundamentally distinguishes their nutritional and health needs from dogs and humans. Understanding feline physiology, recognising signs of a thriving cat, and knowing when to seek veterinary care are the foundations of responsible cat ownership and a long, healthy feline life.

Understanding Feline Biology and Needs

Cats are obligate carnivores with metabolic requirements that cannot be met by plant-based diets alone. Unlike dogs, cats cannot synthesise taurine, arachidonic acid, or vitamin A from plant precursors — these must come from animal tissue. Taurine deficiency causes dilated cardiomyopathy (a serious heart condition) and retinal degeneration, making it the most critical nutritional concern in feline diets. Cats also have a low thirst drive — an evolutionary adaptation to obtaining moisture from prey — making hydration a significant health consideration, particularly in cats fed exclusively dry food.

Signs of a Healthy Cat

Physical signs: Bright, clear eyes without discharge; clean ears without dark debris or odour; healthy coat with natural sheen (not excessively dry, flaky, or dull); healthy weight with ribs palpable but not prominent; clean teeth with pink gums (not red, swollen, or with significant tartar); normal energy and activity for their age.
Behavioural signs: Regular, consistent appetite; normal toileting habits (frequency, consistency, absence of straining); social engagement appropriate to their personality; normal grooming without excessive licking or bald patches; absence of hiding (a key sign of pain or illness in cats, who instinctively conceal vulnerability).
Digestive health: Normal stools — formed, not excessively hard or loose; no vomiting beyond occasional hairballs; absence of bloating or audible stomach noises.

Common Cat Health Problems and Prevention

Chronic kidney disease (CKD): The most common cause of death in older cats. Prevalent in approximately 1 in 3 cats over 12 years old. Risk reduced by adequate hydration (wet food, water fountains), avoiding excess dietary phosphorus, and annual blood monitoring from age 7+. Early detection dramatically improves prognosis.
Dental disease: Affects approximately 85% of cats over 3 years. Periodontal disease causes pain, difficulty eating, and systemic inflammation affecting heart and kidney health. Annual dental checks, dental chews, and ideally tooth brushing (achievable with patience and a cat-specific toothpaste — never human toothpaste).
Obesity: Affects 40-50% of domestic cats. Overweight cats have dramatically increased risk of diabetes, joint problems, urinary disease, and hepatic lipidosis. Primary causes: overfeeding, free-feeding, inadequate activity, and excessive treat provision. Work with your vet to establish a calorie-controlled feeding protocol if your cat is overweight.
Hyperthyroidism: The most common endocrine disorder in older cats. Signs include weight loss despite normal or increased appetite, hyperactivity, vomiting, and unkempt coat. Highly treatable with medication, radioactive iodine, or dietary management.
Lower Urinary Tract Disease (FLUTD): Encompasses cystitis, bladder stones, and urethral obstruction (life-threatening in male cats). Risk reduced by adequate hydration, stress reduction, and appropriate diet.

Cat Nutrition: What to Feed

Wet versus dry food: Wet food is nutritionally superior for most cats — providing critical hydration that cats do not adequately compensate for when fed dry food exclusively. Chronic mild dehydration is a significant driver of kidney disease and urinary tract problems. Transitioning cats to at least 50% wet food significantly improves long-term urinary and renal health outcomes.
What to look for in cat food: Named meat sources (chicken, tuna, salmon) as primary ingredients; taurine listed (or guaranteed analysis showing adequate content); AAFCO complete and balanced statement; no excessive fillers (corn syrup, excessive grains).
Human foods safe for cats in small amounts: Plain cooked chicken or fish, small amounts of plain cooked egg, plain cooked rice (for digestive upset).
Toxic to cats: Onions and garlic (Heinz body anaemia — cats are more sensitive than dogs), xylitol, chocolate, alcohol, grapes and raisins, raw dough (yeast produces ethanol), and high doses of vitamin D supplements.

Preventive Care Schedule

Annual: Full physical examination, dental check, faecal parasite screening, vaccinations (core: feline herpesvirus, calicivirus, panleukopenia; additional as indicated by lifestyle and geography), flea, tick, and heartworm prevention.
Blood work: Annual from age 7+, or more frequently in older cats. Catches CKD, hyperthyroidism, diabetes, and anaemia before clinical signs appear — dramatically improving treatment outcomes.
Dental cleaning: Every 1-3 years under anaesthesia depending on individual dental health.
Neutering: Significantly reduces risk of reproductive cancers and uterine infection (pyometra in females), reduces roaming and fighting behaviour, and contributes to population control.