Moondance Alexander(2007)

Curiously named teen Moondance Alexander lives with her eccentric mother, and is faced with another uneventful summer until she discovers a lost pinto pony named Checkers. Although Moondance returns the horse to his rightful owner, the gruff and mysterious Dante Longpre, she is convinced that Checkers is a champion jumper in disguise and is determined to help him realize his full potential.