This has the same advantages as my bread pans with the trough being deep enough that they can't spill it out with their beaks. I've thought about doing some kind of feed shute like that for when I feed dry.
Nice thing about the bread pans is that if you're not "handy", or don't want to...
I finally found an easy way for no waste. Ever.
I put the feed in pyrex bread pans. They're deep enough, and narrow enough, that they can't get in it to scratch it out, and deep enough that they can't flick it out with their beaks. Of course, they aren't a self-filling feeder, but I never...