Hinny is easier to obtain when the lower chromosome count, the donkey, is in the male. Therefore breeding for hinnies is more hit-and-miss than breeding for mules." The male hinny or mule can and will mate, but the emission is not fertile. Male hinnies and mules are usually castrated to help control their behavior by eliminating their interest in females. Female hinnies and mules are not customarily spayed, and may or may not go through estrus. Female mules have been known, on rare occasions, to produce offspring when mated to a horse or donkey, although this is extremely uncommon. Since 1527,
Multi-male group more than one adult male, more than one adult female, and offspring. Within Order Primates, it is the most common social group type, with group sizes ranging from 10 to 100 individuals composed of several males, and numerous females and offspring. Large groups of primates are called "troops”, which are characterized by complex intratroop politics and competition. Multi-male groups are most common among semi-terrestrial primates such as savanna baboons and macaques, but is also seen in some colobus and New World monkeys. Social lemurs sometimes often live in multi-male groups, and other primate species like chimpanzees live in fission-fusion multi-male