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When Do Cats Stop Growing? (Kitten to Adult Timeline)
Most cats reach adult body size at 10-12 months and full maturity around 2 years. Veterinary sources on the growth timeline, life stages and feeding for optimal growth.
FAQ
When do cats stop growing?
Most cats reach adult body size at about 40 weeks — roughly 10–12 months — and full physical and behavioural maturity around 2 years. Both figures are ranges, and breed shifts them. Source: When Do Cats Stop Growing? (Kitten to Adult Timeline)
What are the cat life stages?
The 2021 AAHA/AAFP guidelines define kitten as birth to 1 year, young adult 1–6 years, mature adult 7–10 years and senior 10 years and older; International Cat Care adds a junior stage from 7 months to 2 years, when growth completes. Source: When Do Cats Stop Growing? (Kitten to Adult Timeline)
How fast should a kitten grow?
Aim for optimal, slow and steady growth, not maximal — high-energy foods, overfeeding and free-choice feeding increase obesity risk, and excess calcium can cause growth abnormalities. Source: When Do Cats Stop Growing? (Kitten to Adult Timeline)
Do big cat breeds take longer to mature?
Growth rate varies by breed, but the claim that Maine Coons grow until 3–4 years could not be verified from core veterinary sources — treat it as breed-club lore, and expect large cats to mature more slowly. Source: When Do Cats Stop Growing? (Kitten to Adult Timeline)
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