Nogtail

The Nogtail is a demon -like creature resembling a piglet, but stunted by narrow black eyes, a thick stubby tail, and long legs. It is mainly found across rural areas in Europe, America and Russia. Nogtails sneak into a pigsty, and suckle on an ordinary pig which curses the farm. The longer the Nogtail goes undetected, the longer the blight will stay on the farm.

Fast and hard to catch, the only way to make sure the Nogtail will not come back is to chase it away with a pure white dog. The Pest Sub-Division of the Ministry of Magic's Department for the Regulation and Control of Magical Creatures maintains a pack of a dozen albino bloodhounds specifically for this purpose.