Kittens typically reach puberty between 4 and 12 months of age, a period when they are at their most mischievous.

Kittens enter puberty around six months old, at which point cat owners can use some simpler methods to care for them.
Of course, whether a cat is mischievous also depends on its breed, upbringing, and individual personality. Some kittens are quiet from a young age, while others are very active and playful.