Horse chow is a type of feed that is specifically designed for horses. It typically consists of OATS and HAY, which are both common ingredients in horse chow. OATS are a type of cereal grain that is high in fiber and protein, while HAY is a type of grass that is dried and used as fodder for animals. Both OATS and HAY are essential components of horse chow, providing the necessary nutrients for horses to stay healthy and strong.