We were having trouble while walking Tobey. He pulls and gets stubborn. A friend of mine recommended the Gentle Leader. WHAT A DIFFERENCE... No more pulling, he walks so well! Just a warning though - getting it fitted can be a struggle, but it is sooo worth it!
I used a Gentle Leader head halter for one of my dogs verry successfully. She was a power puller AND was sharp shy and very difficult with other dogs on a walk. Really worked for her. But - you need to make sure that you use this as a training tool and not a forever walking collar.