MrJudeRaw
Chirping
I would suggest a trough feeder from Wynola ranch website. You can place wire mesh over it. I use 1'' x 1/2'' vinyl coated wire. But you can really do anything at that point to create a barrier. since it attaches to the front of the cage they have to stick their heads out far enough and when they eat and fling it side to side it just moves around the trough.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 the plastic container. Given my current setup is mostly Wynola Ranch cages, I can't make anything too tall. However, I do have some over flow birds in pet carriers where I'm using the chick feeders above. I also have a multi floor cage with ramps between the levels that has a bunch of birds in it and I'm using a chick feeder in there as well. Bottom line is that I need to send a bunch of birds to freezer camp, but have been too busy lately to set the time aside.
Pretty sure they do free shipping and a 2 pack is like 20 bucks. I am going off memory.
I have a wynola ranch cage. the 36x18 breeder one and the trough for it works great. out of all my feeders it wastes a lot less than most.