"Nothing evil can harm that. Bow before it, sure, but not harm it."

Are you sure they're bowing, not barfing? Before you invest money in that stuff, try it first. If you can choke it down, you're a gutsier person than I.

Coincidentally, I've been doing some research on the protein content of various things you can feed laying hens to get the protein up to 16%, and the top stuff ALL looks like it tastes better than TVP:

Dried fish flakes 76%
Dried liver 76
Dried earthworms 76
Duckweed 50
Torula yeast 50
Brewers yeast 39
Soybeans (dry roasted) 37
Flaxseed 37
Alfalfa seed 35
Beef, lean 28
Earthworms 28
Fish 28
Sunflower seeds 26.3
Wheat germ 25
Peas & Beans, dried 24.5

Sue