Plague-dog

Plague-dogs (also known as zombie dogs) are a form of abomination that are seemingly fashioned entirely out of animal parts. They are one of the newer creations of the Scourge, and originally only a single one was found stalking the corridors of the dreaded Naxxramas. Others were later added in Wrath of the Lich King.

Gluth's Bone has a chance to drop from in Naxxramas.

Plague-dogs are tamable by hunters as part of the hound family. They are classed as undead beasts; only undead hunters can tame them by default while hunters of other races must first learn the skill from a Simple Tome of Bone-Binding.