I plan on building a run on a hill for compost production. Carbon, weeds, food, ect... get piled at the top. Chickens add nitrogen and move it downhill. I think I will let them out for a couple hours because I want them mostly working the compost. Not sure if I will do a couple paddocks or just let them free range and fence the garden. Once the grasses and weeds grow big enough I'll get the scythe out for material.