Hi, I have a 90 pound sheperd/collie mix  fur ball and boy was he a puller and a yanker. I was about to give up on our powerwalks all together because some days were better than others. Yes, I tried everything. Patients, practice, and suggestions. One day I was walking by the pet department and thought to myself, is it time for that prong collar thing but didn't have the heart to put it on him. Then I saw the anti-pull harness. I thought no way was this flimsy thing gonna make him quit pulling. It was only 10 bucks and thought what the heck. I came home and put it snug around his chest and out the door we went. INSTANTLY!!!!! Not one tug, pull, or yank. It was the nicest powerwalk we had since we have been together. I highly and strongly recommend this product to anyone that has tried everything but this. GO get one. It was the best investment I have ever made.  Kim and Cody