Ok, in the last week or so, my hens have been going through food like crazy. I watched them for a bit and realized that they are shoveling food out of the feeder. I had the feeder on some cinder blocks so I hung it up. They are still shoveling. So I hung it higher, the big girls have to crane their necks to reach in...but they are still flipping food out AND the babies are having trouble reaching the feeder (I feed them separately, hidden from the others, so I am not too concerned with them not getting enough to eat) I read somewhere that people have attached deeper pans to their hanging feeder and this prevents them from flipping out food. How deep should this pan be?