After just a week using the toilet paper roll with the chick feeder, I can tell a great difference. I have 15 birds in a multilevel cage and have two chick feeders in it. Before, they were emptying both feeders in one day. Now it's taking them two days and they're not even completely emptying...
I have troughs on the Wynola Ranch cages and don't have too much trouble with them being wasteful. The chick feeders are in some taller cages that I'm currently using for overflow birds. I managed to setup one of the chick feeders with a toilet paper roll as @Nabiki suggested. I used some...
I haven't had a chance to try it yet, been busy with other stuff. I may get around to it tonight. I do have one low waste feeder that's a short plastic container to which I added some 3-D printed ports that I got from someone on Etsy. It seems to work OK, but it was a pain to drill the holes in...