Muddy is fine about 95% of the day, but, at times he tries to become a real instigator/dominant. He will snip/bite from behind, growl and in general try to run the roost. I always lay him on his side when he goes through this, and that will sometimes work, other times he goes to the penalty box (crate). We try to give him 2 one mile walks everyday, but, that is not always possible (weather). I realize this may be just the teething phase, but, it is unacceptable. I am running out of ideas, and would appreciate any suggestions/experiences anyone can share. Looks like puppy obedience school is next. Oh, he also gets yard exercise with the training dummy and sit, stay, and come commands. He just gets stubborn at times and it is quite a scene when he does.