my dog Felice is a really nice dog but she hate small animals. Sje has killes 3 skunks at least 5 rats and the worst of them all She killes two puppies. We had a litter of mixed breed dogs. We almost got rid of her because of that. But the vet said that sometimes when A litter of pups is born to a female that is not the Alpha the Alpha female(felice) will kill the pups. Because they don't have the strong genes of the Alpha.She also hates small dogs.
I hate when people say "my dog would NEVER bite." I don't care how friendly your dog is if it is provoked or frightened their instinct is to bite.