Hi Folks, I have 48 chickens and 16 ducks. It seemed like I was filling feeding bowls all the time. I looked around on the site here and found this design. Thank you!!! https://www.backyardchickens.com/a/homemade-wood-chicken-feeder I took the design and built a bigger version that holds 10 - 50# bags. 500#'s should last me about a month. I also have a problem with deer eating all the feed. The birds access the feed from under the shade structure - out of reach for the deer!!! Behind it you can see my coop and duck house. Here's some picsb of the hopper.