In the Cat Fancy - 8 months. It’s when an individual competing as a “Kitten” moves to the “Adult” or “Alter” class (cats can be shown if they are spayed or neutered, unlike dogs). Full maturity really depends on the breed. Like the difference between an 18 year old adult and a 30 year old adult human. They’re both “adults”, but one is a lot more mature than the other. Cats can get pregnant much sooner than that. Boys can get a girl pregnant as early as 4 months. We *try* to keep girls from having babies before their 1st birthday; but there are medical reasons why that might have to happen sooner, but it’s never ideal. You really, REALLY need to get your cat spayed or neutered by 3 months at the latest, if you don’t want to have kittens running around. If your vet gives you some line about “having a heat first” or other BS - RUN AWAY and find another vet!!! Someone who went to vet school some time this century!!!
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