🔍
Contact
Cats › Care Guides › Adult & Senior Cat Care

Adult & Senior Cat Care — What Changes With Age

✓ Guide verifiedSources: Merck Veterinary Manual · Merck Veterinary ManualVerified: Oct 18, 2026

The vet rhythm by life stage

Life stageVet visitsFocus
Kitten (0–1 yr)Series + spay/neuterVaccines, growth, parasite control
Adult (1–8 yr)Annual examWeight, dental, vaccine boosters
Senior (8–9+ yr)Twice a year or more (Merck)Kidney, thyroid, blood pressure, arthritis screening

Kidneys: the senior cat's weak point

Chronic kidney disease is the classic aging-cat diagnosis. Merck's guidance for all stages: continuous access to water and adequate food intake. Early signs to watch: increased drinking, larger urine clumps in the box, weight loss. And one absolute rule — lilies are lethal to cat kidneys; ingestion of any part (flower, leaf, pollen, even the water in the vase) causes severe kidney injury (Merck).

Weight and dental

Obesity and dental disease are the two most common adult-cat problems — and both hide in plain sight. Weigh cats at home monthly (a kitchen scale with a carrier works), and treat bad breath as a dental appointment, not a fact of life.

Indoor enrichment for aging minds

Senior cats sleep more but still need play and vertical options they can actually reach — add ramps if jumps become hesitant. Sudden night vocalization or confusion in seniors deserves a vet visit (thyroid and blood pressure are common culprits).

Sources & verification