Spiked muzzle

The Spiked muzzle is a piece of dog headwear in Fallout 4 that can only be worn by dogs.

Gameplay
It is composed of a leather harness held together by large screws and nuts, and is fastened across a dog's face. Despite being known as a "spiked muzzle," it does not actually restrict a dog's mouth in any way, nor is it spiked, although "spiked" may refer to the bolts that secure the muzzle, akin to the spikes modification for knuckles.

Locations

 * Can be found on raider guard dogs and other kinds of dogs throughout the Commonwealth.
 * In the Bradberton Amphitheater.
 * In Nuka-Town USA, near Cappy's Cafe.