Bighorn Sheep

The Bighorn Sheep is a bighorn sheep that chased after Lisa Simpson.

History
It chased down Lisa who took refuge in Burns' manor, where it then smashed through the window and wrecked the place, while Mr. Burns and Lisa tried to take refuge in the Panic Room. They then took refuge in the loft of the manor.

After Mr. Burns finished telling his story, the Bighorn Sheep broke into the loft and Burns stepped into the way of the charging sheep and was knocked into the back wall. The sheep then turned to face Lisa and gave her pearl necklace pack to her. The Bighorn Sheep then tells his story of finding the pearl necklace attached to a tree. Mr. Burns then rides the sheep back to the Springfield Nuclear Power Plant.