Oh yes, and @selzer , I am not afraid of managing my puppy. He is four months old and I know that GSD's and kids live together in harmony all the time, but new puppy + new nipping raised some serious concerns. His insistence did scare me last night, but apparently, it was puppy play. I have been on this forums, other sites, two vets, and talked with many obedience schools also, because I want the best for him and my family. If it turns out he DOES have serious aggression, my kids come first. BUT---I would do all in my power with training and professionals before it came to that.