Horses, mules and donkeys were bred as civil and military transport. Animals such as horses, mules, or oxen usually pull wagons. Donkeys, mules, and horses are also useful. It commonly affects horses, mules, and donkeys. New iron shoes for horses, mules and oxen were often put on by blacksmiths. The remaining serviceable wagons were pulled by mongrel teams of cows, oxen, and mules. Armies have also used camels as freight animals instead of horses and mules. These streetcars used horses and sometimes mules. They owned eight horses, two mules, and 140 cattle. Most carried steel shoes for horses, mules, or livestock. Larger carts may be drawn by animals, such as horses, mules, or oxen. It seized 5,000 horses, 4,000 mules, and 13,000 head of cattle. It was drawn by teams of oxen, horses or mules. Horses, along with mules and burros, also serve as pack animals. The competing merits of oxen and mules were hotly debated among emigrants.