It’s a trait that comes from the terrier side, and is most often naturally directed towards prey. If your thing is catching rodents with your face, you want to be able to take some bites to the face without immediately giving up going home. Even with selective breeding for dog-dog aggression, most dogs bred for fighting aren’t willing to fight another dog to the death and are culled or sold after being tested.
I have a dog that was seized from a huge fighting ring, is pretty scarred up, and is the undisputed wrestling champion whenever she plays with her dog friends, but her bloodlust is mostly reserved for the neighborhood rats these days.
It’s a trait that comes from the terrier side, and is most often naturally directed towards prey. If your thing is catching rodents with your face, you want to be able to take some bites to the face without immediately giving up going home. Even with selective breeding for dog-dog aggression, most dogs bred for fighting aren’t willing to fight another dog to the death and are culled or sold after being tested.
I have a dog that was seized from a huge fighting ring, is pretty scarred up, and is the undisputed wrestling champion whenever she plays with her dog friends, but her bloodlust is mostly reserved for the neighborhood rats these days.