What Is a Hinny? A hinny is the opposite of a mule. A mule comes from a jack (male donkey) bred to a mare (female horse). A hinny comes from a stallion (male horse) bred to a jenny (female donkey). Now here’s the part most people don’t know: Once a jack starts breeding donkeys, many of them won’t go back to breeding mares at all. They’ll flat-out refuse. Learn more at http://go.muleman.co/5qftjg | Queen Valley Mule Ranch, Inc