Cats that are male? Yes!
Boys that are cats? No!
If you are human, you are forever human until you die.
You have one life, and if you are born as a human, you were nothing before and you are going to be human for the next ~80-90 years (medicine will advance by the time we are old, life expectancy will increase).
You can pretend to be an animal, but you will never be an animal.
Cross-breeding between species requires a lot of the same dna (ex. Domestic Dogs and wolves), anything too different cannot be crossbred (ex. Domestic Dogs and Domestic Cats).
If you are a cheetah, you will never be a human.
Slay.