What happens if a horse interbreeds with a donkey?

This: This is a mule called Daisy. Her mother, Coco, was a horse (well a pony technically I think) and her father evidently a donkey of some description. read more

If a female horse interbreeds with a male donkey than a new species of animal known as mule will be formed and if male horse and female donkey interbreeds than they will be sterile. read more

Equid (horse, donkey, zebra) hybrids are well known and some are bred commercially. The generic term for a zebra hybrid with a horse, pony, donkey or ass is a zebroid. The generic term for a hybrid of a zebra with any type of donkey or ass is a zebrass. read more