Just a question, since getting my new pup, all's been going pretty well except for nipping. He plays with the girls, but then does quick nips at the girls muzzles. Chloe generally turns away and stops playing with him, but Nell tends to nip back. My question is, should I get involved with this, or should I let them work things out between themselves? They don't fight, and play pretty well, but occasionally get a lightning fast nip from Nell if he becomes nippy. Is Nell just setting the boundaries for him? Nell does put up with quite a bit of his puppyness, I just don't want a good relationship ruined if I do the wrong thing. Should I be stepping in, or do you think it will be better to let Nell set the boundaries for him?