Long thread...I have to admit I didn't read the entire thing. However...
What you may want to look into is rearing black soldier flies. They will eat anything...even an entire mongoose! They are attracted naturally, so there is no stocking, and if you build the growth area correctly there is no maintenance other than throwing in kitchen scraps. It is a self-feeding contraption that will give constant streams of fresh protein to your chickens or fish. We use it in our aquaponics and chicken areas.