How long will the kitten's feet come out first and die?

The life and death of a cat has nothing to do with its posture at birth.

The life and death of a cat has nothing to do with whether its feet come out first. As long as you take good care of it, you can survive.

Kittens are mammals. It is a solitary animal. When a cat is very young, it needs the protection of its mother to survive.