I recently watched Me and or the Dog and Victoria is totally against a dog collar that shocks the dog, not only is it painful but it can cause the dog further harm and also bad behavior, this one dog would not even go out the front door or near the back yard as he associated the PAINFUL SHOCK WITH THAT.
I know of many people who have used this product with GREAT results, my friend has a yorkie that can bark from dusk till dawn, she purchased this and now all she has to do is go to pick it up and he stops immediatly. Its very in expensive and has very good reviews. It is certainly worth the few dollars to see if this is a more effective way of training.
Amazon.com: Pet Parade Dog Repeller and Training...