I built an area into my chicken run for composting as well. I had read about using the chickens to turn the compost piles, and liked the sound of it. Just last night I introduced my almost-6-week-old chickens to their first pile of weeds I had pulled from the garden. They had a great time ripping them to shreds and scattering them everywhere. I figure I'll just rake them back into the area when the chickens are done eating and playing with them, and I am just going to keep a chunk of my large run for the compost pile. I was picturing just raking all the poo and whatnot from the run into the pile every now and again, and other than that, just letting the chickens have their way with it. They do appreciate the pile to dig in!