The DNA of a dog's breed contains par of her "instruction manual" so to speak. You dog's breed is made of what she was built for., so the more purebred she is, the more likely she will draw on the characteristics of her breed in order to release excess energy and frustration.
I started working with Daddy when he was four months old. If I had not given him vigorous daily exercise when he was younger, if I had not been clear and consistent about his rules, boundaries, and limitations for the time he was a puppy; and if I did not stay on the job 100 percent of the time as his unquestionable pack leader, them, if he became frustrated, perhaps Daddy's pit bull genes could have driven him to become destructive. But the point is, with steady pack leadership, I freed him from the fate of living out the bad stereotypes in this genes. Even the half-dozen other pit bulls in my pack, all of whom were aggressive either to humans or dogs before their rehabilitation, are no longer doomed to forever play the role of the "killer pit bull". Bu fulfilling their most basic needs, I can peel away their pit bull overcoats and let them enjoy life simply by being dogs among other dogs.
From Cesar Millan's Book - Be the Pack Leader - PURCHASE BE THE PACK LEADER BY CESAR MILLAN







