Answer-first
At what age is my cat a senior — and what changes then?
By AAHA/AAFP guidelines, cats over 10 are seniors. The practical changes: vet exams move to at least every 6 months (every 4 months past 15), and you start watching function — jumping, grooming, litter access — not just illness.Fact
Age-related physical changes often begin between 7 and 10, so the 'mature' years before 10 are when baselines matter most.
Applies to: Cats approaching or past ~7. This is a definition-and-planning page, not a diagnosis page.
Steps
The timelineFact
- 7-10 years: age-related changes commonly begin (most cats show some by 12)
- Over 10: senior — minimum twice-yearly vet exams (AAHA/AAFP)
- Over 15: healthy cats every 4 months; chronic conditions more often
- Your vet may also recommend thyroid (T4) screening in apparently healthy seniors
What aging actually looks likeFact
- Joint disease is nearly universal: ~90% of cats over 12 show radiographic DJD
- But cats rarely limp — watch FUNCTION: hesitating at jumps, avoiding stairs, missing the litter box edge, grooming less
- Less effective self-grooming → mats and coat changes (see assisted-grooming page)
What to set up nowProfessional guidance
- Baseline log: weight monthly, water intake, litter output, activity — changes mean more than absolutes
- Twice-yearly exams on the calendar before symptoms exist
- Environment: low-entry litter box, steps to perches, no-jump food/water
Normal vs keep-watching
Normal: A 10-year-old who plays less explosively but still eats, grooms, jumps (maybe via a chair), and holds weight.
Keep watching: Monthly weight, jumping willingness, grooming quality, thirst, and night vocalizing — the senior six.
When to contact a vet. Increased thirst/urination, weight loss with normal appetite, sudden night yowling, or any functional decline that arrived FAST is a vet visit now, not at the next scheduled exam — senior diseases are most treatable early.
What changes this answer
- Age band (mature vs senior vs 15+)
- Chronic diagnosis (vet-set schedule overrides)
- Indoor/outdoor lifestyle (risk profile)
Common mistakes
- Waiting for limping to suspect arthritis (cats don't limp, they stop jumping)
- Annual exams past 10
- Reading slow-down as 'just old' without a baseline to compare
- Changing diet to 'senior food' without a vet conversation
Sources
- T1 (AAHA/AAFP joint practice guidelines, peer-reviewed in J Feline Med Surg) · Tier 1 · verified 2026-07-17 · commercial bias noted · source conflict noted
- Cornell Feline Health Center (veterinary academic; tier 1) · Tier 1 · verified 2026-07-18
- T1-T2 (Cornell Feline Health Center; FDA-approved label for Solensia/frunevetmab; International Cat Care) · Tier 2 · verified 2026-07-17 · commercial bias noted · source conflict noted
- Cornell Feline Health Center (veterinary academic; tier 1) · Tier 1 · verified 2026-07-18
Real questions cat owners ask
- Is 10 old for a cat?
- How long do indoor cats live?
- Should senior cats eat special food?
Birth date in your Passport profile flips the tools to senior cadence at 10 automatically. Set up your Cat Passport.