Serving humans for thousands of years, donkeys have fulfilled many tasks. In helping out on the farm, transporting goods, siring mules, keeping horses company, guarding sheep, and even being kept as pets, donkeys are very capable mammals. As beasts of burden, donkeys have adapted much and are valued for their ability to live in the desert. With their tough stomach and ability to efficiently retain water from food, donkeys surpass horses. Famous for aiding soldiers during times of war and for their overall dependability, the donkey population is increasing and is appreciated.