HinnyThe word hinny is also a term of endearment used in North East England, equivalent to honey; see Geordie and Mackem. Hinny Conservation status Domesticated Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Perissodactyla Family: Equidae Genus: Equus Species: Equus caballus x Equus asinus Binomial name noneSynonyms Equus mulusA hinny is a domestic equine hybrid that is the offspring of a male horse and a female donkey. Thus, a hinny is restricted to being about the size of the largest breed of donkey. The male hinny or mule can and will mate, but the emission is not fertile. In contrast, according to the ADMS, there is only one known case of a female hinny doing so.