Regular daily walks are a crucial part of keeping your dog calm and balanced, so what do you do when you can’t keep your dog under control on the walk? Try Cesar’s new Pack Leader Collar! When used correctly, it can be an effective tool for restoring peace for both of you. The problem with other collars If you watch a sled dog pulling a load, you’ll notice that their harness fits around the base of the neck and shoulder girdle. Why? Because those are the strongest muscles in the dog’s neck; it’s where all her pulling strength is concentrated.