When Mucky decides it would be better if he was a unicorn, Owl tries to help—but wouldn't a true friend like him just the way he is? Mucky is fed up with being a "drab old brown" horse who smells so bad that none of the other horses want to share his field. Instead, he wants to be a unicorn with a gleaming white coat and a long horn that the other horses admire. So Owl comes up with a plan…