Simple little chicken feeder. I'd say works best when the chickens are still pretty small, but have had my full grown chickens eat out of this for a little while. Anti-spill piece I glued on top, helps with the birds flinging the food out of the feeder. Can be used without any of the tubes, but the feeder tube keeps them from eating out of the top, as well as holding more food, and the extension just allows you to load it up last a bit longer.