i have a black lab that turns one on sunday that is an all around awesome dog. he minds well, fetches, not gun shy, listens ect. the one thing that really drives me nuts is that when he is hyper or playful he kind of snaps his jaws at you (mostly my wife) when you give him a command. its almost like a back talk. hes not trying to bite or anything its just a quick "snap". he mostly does listen to the command and obeys but this snapping of the teeth drives me nuts! i cant yell at him and tell him no because i just told him to sit or whatever. any suggestions??? thanks