First of all, the Gentle Leader? Headcollar is NOT a muzzle. When fitted properly, your dog is free to open his mouth to eat, drink, pant, fetch, bark and even bite - except when you close his mouth by pulling on the leash. The Gentle Leader? Headcollar features two soft nylon straps - the collar portion fits high at the top of the neck, and the nose loop fits loosely and comfortably across the base of the muzzle. Each strap has a distinct and important effect. Medium size recommended for dogs 25 to 60lbs and Large recommended for dogs 65 - 125lbs.
