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How can I tell if my cat is fully grown and considered an adult?

Updated On September 23rd, 2025

How do you know if your cat is an adult

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Answered By Maria DVM

Veterinarian

Published on June 10th, 2019

I would evaluate her teeth to determine if she is older than 6 months, at this point they should have all of their adult teeth in. Your veterinarian should be able to estimate her age for you. Thank you for using Petco Pet Education Center, formerly Petcoach.

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