Horses arrived in the Americas in the 1500s and quickly became a vital part of the ecology and mythology of the continent. EL CABALLO, a thought-provoking and beautifully filmed documentary, delves into the controversy swirling around the last few wild horses living in the western U.S.: should these animals be considered a native species and given the appropriate protections, or should they still be classified as exotic and continue to be valued less than cattle? The finely crafted documentary interviews a wide-range of experts, and offers up a rich portrait of the current state of America's wild horses.