Ruby uses a Gentle Leader and it has worked FABULOUS! She had a horrible pulling problem, and this has helped significantly. She has never gotten out of it. Last night for instance, we were taking a fairly late walk and we saw a raccoon about a block ahead of us. Ruby desperately wanted to go chase it, but she couldn't get out of the Gentle Leader. It really helps you better control your dog. She hated it at first, but has gotten much more used to it by now.