Back at the Barnyard S02 E14 Paging Dr. Filly

The animals call Dr. Filly to settle a recent persistent argument between Freddy and Peck, but instead of making things better, Dr. Filly seems to make it worse when other animals begin disliking each other. They were almost going to leave (except Bessy) until Otis reveals that "Dr. Filly" is an imposter donkey named Chip who likes to impersonate Dr. Filly.