These structures are called feed bins and are used for storing the feed for the hens in the barn. Feed deliveries are made weekly. The feed is pre-mixed at the mill and consists of a mixture of corn or wheat, soybeans, vitamins and minerals. The farm staff works closely with a poultry nutritionist to ensure the chickens eat feed with the highest nutritional content. Together, they make appropriate changes as the hens age to maintain a healthy flock.
Here, you can see the truck making the delivery.