First off if you are going to do Schutzhund you want a firecracker. Second he is 8 weeks old so there is no dominance at that point. Put dominance theory out of your mind. You have a baby pup, they don't come out of the womb looking to take over your house and run your family although that might come later. Everything you train him to do should be done from a motivational point of view for now without physical corrections aside from maybe a poke here and there if hes really out of hand. You are not trying to make the dog submit and especially for schutzhund training you wouldn't want this anyway, and once you see a schutzhund trainer you will begin to understand why. Just keep redirecting to puppy shammies or toys. Teach the dog the off command using treats at various levels of arousal.
The nipping and biting isn't aggression at that age. They all do it. The best dogs for sports like schutzhund do it a lot.
Last edited by Baillif; 10-02-2013 at 10:32 PM.