Merlin in the park. Merlin is Sarah's pet dog in Labyrinth. The sheep dog closely resembles Sir Didymus' dog Ambrosius. A real dog was used for the role. Retrieved from "https://muppet.fandom.com/wiki/Merlin_(dog)?oldid=1096146" Categories: Labyrinth Characters Live Animals Pets Community content is available under CC-BY-SA unless otherwise noted.