These cross-breed racing pigs are only 3 months old, but they're already training for their final race. Soon they'll be too big to fit through the obstacles, and a new batch of piglets will replace them. Pig races are especially popular in China right now as people celebrate the Year of the Pig. A normal race is just one lap long, and the piglets get a 10-minute break once they cross the finish line. And they aren't the only animals with a need for speed.