idk if it works with all dogs but we put my dog in a pen with a hog and put a shock collar on him and every time he catches buzz him until he lets go. and keep adding dogs to him and doing the same thing idk it worked for me but every dog is different
Due to others replies I re read your post. Im not sure. Has this dog turned into a baybreaker or are you just worried that he will?
If so:
In my experience a muzzled bay breaking dog just makes a "worse" bay breaking dog and stands a better chance of getting himself and other dogs in more trouble than he would without it. From what I have seen with other dogs is they try even harder to catch with the muzzle on and makes a bay even crazier and shorter. I have my theories why the dogs reacted this way with the muzzle but Im not sure.
Im not disagreeing with using a muzzle just sharing my experience with them. Different dogs react differently to things.
I have never personally used the shock collar technique described by "lazyjhogdogs" but I have seen it used with great results.
If it were my dog I would try the shock collar before the muzzle.