I have two 16-week standard poodles. They love to bite each other when they play, but the last couple of days, one of them has come in twice with blood on his face and my kids have gotten bitten when outside while the puppies were playing. How can I teach them to play without play biting or with just soft biting? The behavior has become so ingrained at this point that I don't know if they know how to play any other way. Would it be crazy to put muzzles on them to force them to find new ways to play? I don't allow roughhousing at all in the house, so this all happens outside where I'm not watching closely. I can keep a closer watch when they play, but where would you draw the line? No mouthing at all? And how do you teach them this?