Review on Premium Herm SPRENGER Pinch Collar-Small 12" x 2.25mm: Optimal Control and Comfort for Your Dog's Training by Heather Gorman

This collar has helped me a lot when walking my little Chihuahua/Pug. She has so much energy that she wanted to pull the leash all the way through. Well, contrary to what I think is for the best, I let her get away with it which made her feel like she should be in charge which resulted in her becoming aggressive towards other dogs and people when we were walking went. . She was one of "those" little dogs. And it was my fault. The collar she was wearing simply suffocated her, causing her to cough and vomit. The belt was useless. I put this collar on her and she became trainable. It wasn't punishment. He mimics what an alpha dog would do to calm them down and let them know they are in charge. You wouldn't harm them. You would get their attention. She noticed me and turned to me for instructions. She got a lot better. She still has room to move, but she's several steps below where she was.