Even after getting onto him for many months, my dog likes to nip at me. Iecan understand his herding instincts when he nips at my hells and calves [which actually tickles--he just kinda "mouths" them]. But, whenever we start playing, or if I pet him vigorously, he has a tendency to bite my hands--even after I have scolded him for it. He finally stopped biting my wife after she started wimpering like a hurt puppy everytime he did it--took about two weeks. When I tried that, he took it as a game, or as "come in for the kill now." Any suggestions on how to stop his biting? He is about 9.5 months old now, and 80 lbs.