Muzzles can be very effective tools for aiding in training and for ensuring safety when dealing with aggression issues in your dog.
The point of a muzzle is to keep your dog from being able to bite and cause injury to whoever is handling them. Muzzles can be used during training sessions to modify behavior.
Usually, they will be used on a dog that has issues with handling and it is trained to be less aggressive.
However, they can also be very helpful when used on a dog that is only likely to bite during treatments or grooming sessions.
A muzzle can help keep a snappish dog safe so that their nails can be clipped or their hair can be brushed. It’s also good for use during vaccination or other medical treatments.
Your veterinarian will thank you, as will your groomer or vet if your dog is not yet fully trained to refrain from snapping and biting while they are being handled.