I have been using the 5 gallon bucket with PVC hanging down, but with the increase in my flock I need something different. Also, my run in in a rectangular shape, so that round bucket takes up too much room. I think I will make the feeder below. Make 2 that butt up against each other.
http://www.simplyeasydiy.com/2015/07/zero-waste-chicken-feeder.html?m=1
http://www.simplyeasydiy.com/2015/07/zero-waste-chicken-feeder.html?m=1