I used to have the same problem with Kaiser, my boyfriends doby, and Maizee. He is about 5 months younger than her so he's still in the big playful stage. He thinks he is just playing but he broke her skin once too. I flipped out after that. I didn't like it in the first place, but that really pushed it then. Maizee is FREAKED OUT of Kaiser and will go no where near him now, not that I would let her even if she wanted to. Maybe it will work when the puppy grows a little and settles down, but I would try to keep them separated now, because I didn't with Maizee and she's scared of other dogs now too. . .
