A hinny is the offspring of a male horse and a female donkey (jennet or jenny).
They are rarer than mules, which are the offspring of a male donkey (jackass or jack) and a female horse.
Like the mule, the hinny is almost always sterile.
Hinnies are similar to mules in that they are generally more intelligent than horses, and more cooperative than donkeys.
Both are also healthier and less expensive to feed and maintain than horses.
This is a trait these hybrids get from their donkey heritage.
Hinnies are on average slightly smaller than mules.