I do believe that the majority of aggressive dogs are a result of poor treatment. But I do not believe that is always the case.

Look at Heinz57's Arthur or my RB Rosco. They were both dogs raised in loving homes from puppy age and they still turned out aggressive.

I hope I don't offend you, I'm not trying to argue...I do agree that most of the attackers came from cruel backgrounds. But I just don't think all of them do.