More than two million dog owners have found the secret to stress-free walks. Immediately eliminates pulling on the leash. With the Gentle Leader, when you steer the dog's nose, you steer the dog's body. It's virtually impossible for a dog to drag you down the street when its head is turned to face you. Because it is scientifically designed to work with your dog's natural instincts to control unwanted behavior, results occur in minutes - not weeks. Sizing: Petite ' for dogs under 5 pounds Small ' for dogs up to 25 pounds Medium ' for dogs 25-60 pounds Large ' for dogs 60-130 pounds Extra-large ' for dogs over 130 pounds