Terror Dog

From Multiversal Omnipedia

Terror Dogs were the monstrous dog-like servants of Gozer. They were lion-sized, hairless quadrapeds with glowing red eyes and short, curved horns portruding from the sides of their heads. Although physical beings and not spirits, the terror dogs were nonetheless capable of demonic possession, and although they looked and behaved like nothing more than savage beasts they were actually sentient, intelligent creatures. Notable Terror Dogs included Zuul and Vinz Clortho.