Padfoot

"According to Yorkshire folklore, the Padfoot was an inhabitant of the moorlands around the city of Leeds. it was reported to be in many different shapes: either a great sheep with shaggy fleese and red eyes, a black donkey, or a great white dog. The first that a traveller knows of its apperance is the sound of its footsteps padding behind them in the dark, sometimes accompanied by the clanking of chains. Like th Gytrash and Barguest, it is inadvisable to approach it."

-The Element Encyclopedia of Magical Creatures