Pointerpup, I understand where you are coming from and it certainly was a thought when considering what to do. I'm going to work with him some more and since I've been able to stop him with the whistle maybe I'm making more of it than need be. I've never had a shock collar on him and often wondered if using one to reinforce might work if used on low levels. I know that shock collars, if used improperly, can do more damage than good. Any opinions on that???