I have a typical feeder for my small flock. My girls will only eat crumble (much to my chagrin after a few attempts to switch to pellets) and it seems like dust just keeps building up to where the food gets stuck and won't empty into the tray. Even if I've just cleaned the feeder, it seems like I'm having to constantly shake it to get the feed down. My current feeder looks like this: Is there a better way/feeder? Would making a PVC feeder with an upright pipe and two 45 degree elbows be sufficient - or would I have the same problem with dust build up and feed getting stuck? **Edited to add: The PVC feeder I was thinking of making is similar to the top one in the picture below. I am also open to other ideas, too.