In training with Roxey we used a choker. But all that seems to do is "choke" her! So, we tried a prong collar. WOW! We tried it in school, with the teacher showing us how to use it, and the difference is unbelievable. She didn't even try to pull, like she knew it was there, so she never even tried. I personally used to think it was cruel, but it's only in the way you use it. If it's used right it's a good training tool, if not, it just hurts the dog. But I read that regular choke collars can cause trauma on the windpipe, and I don't want that! Just thought I'd put my 2 cents in