Why Do Some Dogs Eat Their Newborn Puppies?

Dogs eat their newborn puppies when they do not recognize the puppies as their own, because the pain from mastitis and suckling provokes aggression, or because a puppy is stillborn or unhealthy. However, cannibalism rarely occurs among canines. Some breeders theorize that cannibalism is an inherited trait that may pass from one litter to the next.

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