While the packaging says that it only helps with pulling, I say it has stopped it completely. Walking him is a whole new experience. The leash always has slack and we are both happier for it.
Yes, we leave his collar on when we harness him LOL
I wasn't given this product for review or anything, I just went to the pet store, asked for their help, and this is what they recommended. If you have a dog that pulls, you have to try this harness. It is the one of the best investments you will ever make!
Hunter was pretty uncooperative about posing for a picture. But you can see the leash clips on in the front chest area instead of on the back of his neck.