A small Spanish horse; a genet.

Genet, ginet (French), jineta (Spanish)] A small Spanish horse; also a light horseman. (Davis, R.H.C. The Medieval Warhorse: Origin, Development and Redevelopment, 136)

Female donkey (pronounced jenny)

The definition of jennet varies depending on location and on the antiquity of the usage. It may mean a small Spanish horse, a female donkey, or a hybrid produced by a male horse and a female donkey, the opposite of the traditional mule-producing pairing of a female horse with a male donkey.