So DA is something that is directly correlated with other traits then? (Gameness, for example.) If so, then I agree with everyone - it should just be left alone. But, if it were able to be bred out and the dog still stay high drive/have the temperament it is supposed to (I'm not just talking about Pitties here, BTW, but all dog aggressive/same sex aggressive breeds - like Dobes and their male/male issues) it seems like it wouldn't hurt to eliminate it. Another question: Is DA a natural thing for dogs, or is it a result of man selecting for certain traits? Are feral-type dogs naturally DA, or dog social?