some god points that I passed over. Perennials? Are those plants that come back every year?(I'm no expert in these things) 'Cause I was thinking.....Are there any plants/grains that are good for feeding chickens that will come back every year without reseeding? Also, I was thinking about planting fruits like blueberries, bush cherries, grapes, rasp/black berries ect. for them to be able to add to their feed in take or even the human harvest and add to their feed, either way. And small things like those mentioned might even be good to plant in a run with a cage around them.
Yes, perennials don't have to be replanted. I planted figs, blueberries, and plums last year, and a bunch of comfrey this year.
Instead of thinking strictly in terms of growing a bunch of stuff to harvest and make into chicken feed, I like to let the chickens do most of the work. They turn my compost piles in the process of looking for bugs and other goodies, eat bugs and weeds around the garden fence, as well as inside the garden, one section at a time. I've found that they'll browse some of the cover crops, like field peas and buckwheat, without eating so much that they kill the plants. Fruit and veg culls go to them, as well. So a certain percentage of their food is a byproduct of something I'd be doing anyway.
It's a win/win, and less work than it sounds like. It does take up a lot of space, and wouldn't fly in an area with a Spanish Inquistion-style HOA.