When I was in High School, we adopted a Chow Chow from a guy who couldn't keep her any more. One of the coolest things she ever did (was way smart) was when my brother had a friend over. They were wrestling and goofing off, and Osa (the dog's name was Osa, she was our little bear) was just sitting there, head on paws, watching. Well, one thing led to another and an arm got twisted or a nose got bumped and the screwing around turned serious. Osa could tell immediately that it wasn't fun anymore, before I figured it out, and got up, walked over to the pile of boys, gently but firmly grabbed the neighbor kid by the belt with her mouth, and proceeded to drag him off my brother. He started to struggle and she growled, ever so slightly but enough to let the kid know she was serious and he got the picture. No barking, no biting, not even any drool or bite marks on the belt, amazingly enough. It was just one of those things were we were all, neighbor kid included, kind of in awe. Once things calmed down she went over to the neighbor kid and let him pet her to show that there were no hard feelings, but that kind of behavior wasn't going to be tolerated. Man I miss that dog.