like i said already...... its a product of bad discipline and poor socialization on the part of the owners, its the a$$hole gangster and such that feel the need to be tough
keep on looking slug this topic has been so glamorized by the media im sure its an endless list. what that will not tell you is how the dog was raised or beaten or neglected by its owner.
not saying its the only reason a dog can be mean but its a huge factor.
alot of people buy these dogs for the image and after they are no longer puppies and need to be taken care of and loved, stop taking them for walks, stop taking them around other dogs and people, that makes them scared of what they are not used to.
and any scared dog is a dog not to be trusted........ just like people