The Mule is a cross between a donkey and a horse. Both male and female mules have the correct parts for breeding they are, however, sterile and cannot breed. In a very rare instance (about 1 in 1 million) a mare mule has had a foal. But no male mule has ever sired a foal. If you cross a mule with a mule you would get nothing. Male mules are usually castrated because they become dangerous with too many hormones. You can't show an intact male mule. The Mules ears are the same shape as the horse but somewhat smaller than a donkeys. The hair will be a combination with a tail more like the horse parent. They can be shown with a variety of hairstyles from clipped to shaved (roached). Mules come in a variety of sizes and shapes from Miniature mules (even to under 36") all the way up to 17-hand Percheron draft (by Mammoth Jacks) Mules. The build of the mule is a combination of both parents. The mule has the possibility of growing taller than either parent due to hybrid vigor. Mules are used in sports just like horses including harness, saddle and for cutting, roping or dressage. The Mule has more endurance and can carry more than a horse of equal size. The Mule particularly surpasses the horse in high jumping. The Coon Hunter’s Jump is a sport created just for Mules. Mules only 50 inches tall at withers have been known to clear jumps up to 72 inches high. Mules will not put themselves in danger. This possible stubbornness is the Mules way of telling a person that things are not right. The Mule can seem lazy, but they are very smart and will work but not be overworked and the utmost patience is usually required.