Squealer

"The best known among them was a small fat pig
named Squealer, with very round cheeks, twinkling
eyes, nimble movements, and a shrill voice. He was a brilliant talker, and when he was arguing some
difficult point he had a way of skipping from side
to side and whisking his tail which was somehow very persuasive. The others said of Squealer that he could
turn black into white."