What are pit bulls bred for?

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The pit bull was originally bred and trained to be a tenacious fighter and to display aggression only against other dogs. Some breeders, however, trained and mistreated their pit bulls in such a way as to induce a vicious temperament and aggression toward humans, which generated the dog’s negative reputation.

Why do dogs bark?

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Barking is a way for dogs to communicate with other dogs and with humans. Fierce barking or growling often signals that dogs are being territorial, feel threatened, or simply want to be left alone. However, dogs also bark when they are bored and want attention from other dogs or from humans.