Muzzles for dogs differ in modification, shape, methods of fastening, types, and materials of manufacture. To make a good choice, you need to focus on the pet's breed, its size, and character. The ideal choice is the one that fits well, is lightweight, comfortable and durable, secure enough to prevent your dog from removing it; easy to clean, easy to put on and easy (for an owner) to remove; prevents a dog from biting, yet allows the dog to breathe freely.