Ponies are small versions of horses. There are over two hundred breeds of ponies, but the Shetland pony is the most well-known. For their size, they generally have thicker features than horses. Such as thicker tails, manes and necks, as well as having shorter legs and shorter heads. When compared to standard sized horses, ponies are actually stronger per pound of mass. A typical adult pony can haul twenty percent of its body weight.