Poultry feed is food for farm poultry, including chickens, ducks, geese and other domestic birds. Before the twentieth century, poultry were mostly kept on general farms, and foraged for much of their feed, eating insects, grain spilled by cattle and horses, and plants around the farm. The top three ingredients in most Nature's Best bagged chicken feeds are corn, soybean meal, and wheat or wheat middlings. When you look at the ingredients list of many types of chicken feed, you may also find: Cereals and cereal byproducts: Cereals in feed may include wheat, corn, sorghum, barley or rye.