Take Me to Paris (1951)

Albert, a jockey, is upset that Thunderhead, his favorite horse, may soon be retired by the stable's owner and put out to stud. He sees a chance to revive Thunderhead's career when Runaway, one of the owner's best horses, injures a leg before he is to be sent to a race in France. Albert plans to replace Runaway with Thunderhead and ride him in the race. However, thanks to two crooked stable employees, things don't turn out quite as planned.