Has anyone ever used a gentle leader for a large dog? I am having trouble with my dog pulling me when we walk even though we have the metal slip collar with the teeth, which we were told was good for controlling large dogs. Also he tends to want to jump out at things, rabbits, squrrels, balls, kids playing, while on walks and its hard to control. I was told the Gentle leader mimics the pack leaders bite to muzzle or something. I want to know if it works before I buy it.. my dog is around 90 lbs... :confused: