Farm buildings are structures used to house and store animals, crops, and other agricultural products. HENHOUSES, which are typically made of wood or metal, are used to house chickens and other poultry. Barns are large structures used to store hay, grain, and other feed for livestock. Byres are buildings used to house cows, sheep, and other livestock. Silos are tall, cylindrical structures used to store grain, silage, and other dry materials.