Thanks for the suggestion to save the dust and make a mash, Cluckies. Wish I'd thought of that before throwing out so much of it in the past! RonP and WVDoug, since my chickens free range, dust is never going to be high on their list of what to eat.
Does anyone else have trouble with the build-up of dust in these U-shaped PVC feeders? We made a couple, and while I like the idea of them, the one with crumbles doesn't work well. First, the feed doesn't seem to flow as well as the one with pellets. And second, there's always such a build-up...