How the cat-age model works
Life stage comes straight from Quimby et al., 2021 AAHA/AAFP Feline Life Stage Guidelines: kitten (birth up to 1 year), young adult (1 through 6), mature adult (7 to 10), senior (>10), with end-of-life recognized at any age but not age-mapped here. Separately, the physiological human-equivalent number is looked up on the AAHA “My Pet’s Physiological Age” poster, which credits an AAFP–AAHA feline chart lineage. We do not invent intermediate ages between poster rows.
What the two outputs mean
The life stage is a clinical planning band (what kind of visit cadence and topics AAHA/AAFP discuss for that age). The physiological chart is a comparative human-year table for client education — not a substitute for staging. If they feel inconsistent, trust the stage label for care conversations and treat the chart as context only.
Explicit limits
- No breed-specific feline longevity tables — domestic cats vary widely indoors vs outdoors.
- Zero age and ages above 30 years are refused rather than clamped silently.
- End-of-life is a clinical status, not something this age form can detect.
- Poster chart values are discrete; we do not interpolate unpublished mid-year cells.
When to see a veterinarian
Senior cats (>10 years) often need earlier lab work, dental evaluation, and kidney/thyroid screening. Any cat with appetite change, litter-box issues, weight loss, or chronic vomiting needs an exam — those signs are outside this calculator’s scope.
Cat age FAQ
- What are the AAFP/AAHA cat life stages?
- Kitten (birth–1), young adult (1–6), mature adult (7–10), senior (>10), plus end-of-life at any age — 2021 guidelines.
- Is the physiological chart the same as a life stage?
- No. Stages are chronological bands; the chart is a separate poster table. We show both on purpose.
- Does this give veterinary advice?
- No. Sick, outdoor-risk, or senior cats need a veterinarian — especially beyond 10 years of age.