A pig is a medium sized mammal. Most of us think that pigs are only pink but there are more colours of a pigs such as brown, white, black and I don’t know if there are more colours. Pigs have excellent memories. A pigs family is called Suidae. Pygmy Hog is the smallest species of pigs and the biggest one is the Giant forest hog. The Large Black and Berkshire pigs are among rarest and oldest breeds in the world. Hippopotamuses and peccaries looks pigs.