The poultry industry is built on soy and corn. Soy being a high energy feed. They do compliment each other well. Corn is easy to harvest by hand, and you can get more corn per acre than the other grains. If my health was not the way it was, I would be planting corn. I like the white millet cultivars because they are easy to harvest, and very fast to mature. I can get a couple crops. I would cut it, and let the birds have it. I used to use it in a rotation. Sorghum is good for our dry summers. Oats are more complete on their own than the others. I tried Amaranth. The seeds are too small and do not mature uniformly. Much is lost. My birds did not get excited about them, but the songbirds did. I want to try drying blueberries for my birds this year. If I have any extra. My wife sells them all. Boiled potatoes mixed with grain is not a bad supplement. The Europeans use to do this. Particularly post war. You can get a lot of potatoes from a small area. I read some studies where sweet potatoes were used to decrease the reliance on imported grains.