Why does a female dog bite her puppies to death?

A female dog bites her puppies to death usually occurs when the female dog gives birth for the first time. The female dog lacks childbirth experience and will become very sensitive. The female dog is in an unstable state and may easily bite the puppies to death. If any of the puppies born by a mother dog are weak, the mother dog will deliberately bite the weak puppies to death in order to increase the survival rate of other puppies. There are many reasons why a female dog bites her puppies to death. Generally, a female dog does not really want to bite her own babies to death.