When the first boarders arrive, Rosie realizes working at the family stable will be more difficult than she anticipated. The extra horses aren't the problem however, it's one of the boarders that Rosie can't get along with. When Grandma explains 1 Samuel 16:7 to the girls, Rosie struggles to see how the verse applies. It takes an annoying boarder, a blind horse, and an extreme race to teach Rosie that while man looks at outward appearances, God looks at the heart.