Muzzle (Frank Welker): A Rotweiler. He is often physically restrained with a straitjacket and mask. Action involving Muzzle is done off-screen, and it is implied by the other Rovers that Muzzle is doing rather gruesome deeds. Muzzle was "Scout", The Sheperd's dog that was kidnapped at the beginning of the first episode, he and Hunter became close friends.