We all know that a cow is supposed to say moo, but what would you do if you heard one say BOO? When Farmer Steve checks on his new cows, he hears the silliest sound coming from the barn: he hears a few moos and a big old boo. Blue the cow tries her hardest to moo, but after her friends give up on her, she leaves the farm. Blue was truly unique, and it was only after she left that the others realized just how special her boo really was.