Marvin is not a happy sheep.
He eats, and eats, until he is so big that there is nothing left for him to eat in the world - at which point Marvin eats the world itself! But, what went in is going to have to come out..
So Marvin decides to do something about it.
All the other sheep are bigger than him, and can run faster and jump higher than he can.
Marvin is not a happy sheep