Training bay dogs in a pen or wooded pen

If a dog naturally wants to catch instead of bay, they will start catching on the jaw, back of neck, armpit, or rear end if there is no ear available. Most of the hogs they encounter in the woods will have ears. I would vest him up and put him in the pen , alone, with a big rank boar that has no cutters. Have a bulldog ready to back him up just in case he starts gettin wrecked. Do this again the next day while the butt whippin is still fresh on his mind as long as he can move good enough to defend himself. If this doesn't back him off, then you have yourself an rcd or a lead in catch dog.
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I have heard of a few cattlemen and bay pen guys using E collars to teach their dogs to bay instead of catch. As I understand it, they use the tone or vibrate feature supported by voice commands to " let go". If this doesn't work, they graduate to light tickles with the shock collar and increase the intensity until they get the desired effect. This method should only be used by experienced handlers who are really in tune with their dogs. It also should not be applied to pups or young dogs who aren't 100% sure of what game or stock they should be working. This approach could easily ruin a good young prospect.