These are our feeders, the 5 gallon was in the covered run and the 15 gallon drum feeder was in our free range area. We had 29 birds at the time and the after hatching 42. The 5 gallon has 3 ports and the 15 g has 4. The 15 gallon holds 75# of feed the 5gallon 25#.
We didn't have any issues with chicks getting stuck but coukd see the idea of making these with smaller elbows say 2 inch. I think someone did that.