Hello I have a 16 week old yellow lab. He is a great dog and not aggressive. Pretty well trained for 16 wks. He likes to rough house with other dogs....wrestling and biting at each other...All friendly as there is no growling or barking or anything. The thing is...He always gets beat and ends up laying on his back under an adult dog. He doesn't seem to mind it, he just chills on his back until the other dog walks off. Should I allow rough housing or break it up? Is it bad for him to always get his butt kicked until he gets bigger or will he lose confidence.