When does a kitten become a cat?

I have a permakitten, (my word for permanently a kitten,) she’s 18.

^^ Aw. That’s cute. :)

I think that usually it’s about 1 year. I do, however, agree with @everephebe, I just lost my permakitten who was around 19. He never grew up, not that I minded!

After the bat mitzvah.

1 year, but depending on the breed and individual personality traits they may behave like kittens well into their teens.

Vaccines begin at 6 weeks, spay and neuter at 6 months, adult at around a year. And your queen should be spayed as soon as the babies are weaned.

Three to four million animals are euthanized in shelters each year – there’s no reason to be allowing your pets to reproduce.

Around 1 year, yes. At around 6 months they will begin to start looking more like cats and less like kittens, usually.