I tried the Gentle Leader and didn't like it. I gave him a high reward for touching the collar with his nose. Then, moved to high reward for wearing it. Same with the leash attached. But, when we walked he would absolutely freak out when it pulled him to the side, when he pulled. Then, he would lay down and roll around trying to get it off. He wouldn't move no matter how hard I tried. Plus, the main reason I stopped using it was because it was removing hair around the area. When I tried the prong, he whimpered the first pull. That made me start to regret my decision using it, but after that he never pulled again.