Hinney
A sterile hybrid that is the offspring of a male horse and a female donkey. Generally considered less desirable than a mule, though has a similar appearance and characteristics. Bred less often than mules because the offspring are smaller than mules and female donkeys are less fertile with stallions than mares are with male donkeys. Also occasionally known as bardot or jennet.
https://en.wikipedia.org/wiki/Glossary_of_equestrian_terms
