https://www.petco.com/shop/en/petcostore/c/stop-the-shock We all know they can be used abusingly. What do they recommended for a dog chasing deer? Number six shot in the ass? I went there about a decade ago for a training choker. When I asked a employee about it she informed me " we do not sell those cruel things". I guess they rather have a dog being constantly choked or jerked to learn walking for a loose chain. Any time I used the training choker it was only used once if the dog had any brains.