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,
Donkey burger to eat horse meat; however, since horses were a valuable resource, common people substituted donkey meat and considered it tastier. Donkey burgers became popular towards the end of the Qing dynasty after the Beijing-Hankou railway line was built, as donkeys were no longer needed to transport goods in and out of Beijing. When departing from Beijing, Baoding is the first major city on the Beijing-Hankou railroad. The traditional freight industry was hit particularly hard there, and as a result, donkey burgers became most popular in Baoding. Donkey burger The donkey burger () is a kind of sandwich commonly eaten in