A head collar is a type of training tool used for dogs, designed to help control their movements and behavior during walks. It fits around the dog's muzzle and neck, allowing the owner to guide the dog's head gently. This can be particularly useful for larger or more energetic breeds, making walks more manageable and enjoyable. Head collars work by applying pressure to the dog's muzzle when they pull, encouraging them to stop and redirect their attention. They are often recommended by trainers and veterinarians as a humane alternative to traditional collars, promoting better leash manners without causing harm to the dog.