Cats are some of human's best friends... but what about Maine coon cats? How much food do they actually eat? Excrement? The Maine Coon is a large domesticated cat breed. It is one of the oldest natural breeds in North America. The breed originated in the U.S. state of Maine, where it is the official state cat. The Maine Coon is a large domesticated cat breed. It is one of the oldest natural breeds in North America.