Trusted by millions of pet owners, the PetSafe Gentle Leader Headcollar allows pet parents and owners to communicate painlessly and effectively in a way their dog instinctively understands. Bad behaviors such as pulling, lunging and jumping are quickly and easily eliminated. When a dog wearing the Gentle Leader begins to pull away, subtle pressure is applied to calming points along the nose loop. This prevents uncomfortable or dangerous pressure from occurring to the delicate throat area. The Gentle Leader is also an effective tool in helping to calm anxious or moderately aggressive dogs. How it Works The Gentle Leader Headcollar is an easy-to-fit training tool for teaching your dog better leash manners. When your dog pulls, the Gentle Leader Headcollar gently moves his head and body back towards you. This effectively refocuses his attention to you and off the squirrel, dog, stranger, or other distraction. You can easily train your dog to heel using the Gentle Leader Headcollar plus your preferred training method. Once your dog has learned to let you lead walks, you might only need to use the Gentle Leader Headcollar as a backup during situations when you'll need extra control, like at the vet or dog park.