The Moo Sisters are three cows who love to sing. Their favorite tune is "Moo River"! Harmony is important to the Moo Sisters, both in song and life. Each sister wears a cowbell that rings in a different key.
Each Moo sister is white with many black spots shaped like music notes. They have big pink noses and two gray horns on each of their heads. The Moo Sisters have green eyes and gold cowbells.
The Moo Sisters have appeared in many episodes of Maggie and the Ferocious Beast.