We got a rescue dog, when he was a pup and a stray, the only food I think he had was dead mice and horse poop, all the telling him no would not work in training him. We got a shock collar, and in one walk around the neighborhood he learned not to eat dead mice. (There were alot around that year) We also saw in town they had rattlesnake training for dogs, to prevent them from getting bit, since we have many rattle snakes here. They were using a shock collar for that also. Instead of paying someone $75 dollars to train our dog, we took a run over dead snake off the road and tied it to a fish line and trained him that way. We didn't have to even train him with the shock collar for chickens, because of the mouse and snake training, he knows if we say no we mean it. Also once the training sets in, you really don't have to shock him every time, you can use the beep-beep, just noise of the collar, no pain as a pre-warning, then they know to obey without actual shock.