Cowinator

Yakkity finds out that his grandfather Yardly Yak was a champion grass-eater who was cheated out of a first place trophy by a rival known as The Cowinator. Granny persuades Yakkity to challenge Cowinator to a grass-eating contest and restore the family name. The Cowinator accepts the challenge but because he's too old to compete he forces his grandson Cowinator III to compete for him.