99.9% of the time the dogs treat the sleeve as a game and as the reward, this is how we train sport dogs, if we were training personel protetion dogs or security dogs we changed it from a game into a serious session. Its difficult to explain typing but the drives and the dogs perception are altered by using body movement, eye contact, pressure and various other methods, the most interesting thing about bitework is that the handler is mostly a bystander whos sole job is to demonstrate good timing when releasing the dog, the criminal as we call them or agitator is the person training the dog an