The American Mammoth Jackstock is a breed of donkey known for its large size and strength. Developed in the United States, these donkeys were primarily bred for their ability to produce mules, which are hybrids of donkeys and horses. They typically stand at least 14.2 hands tall and can weigh over 1,000 pounds. This breed is characterized by its sturdy build, long ears, and gentle temperament. American Mammoth Jackstock donkeys are often used in farming and ranching due to their endurance and versatility. Their size and strength make them ideal for carrying heavy loads and working alongside other livestock.