What benefits will a large run bring for my chickens when they are old enough to use it? I live out in the country and have plenty of space around my existing chicken coop (12x26) for a run of any size. I'll probably end up with a flock of about 25-30 birds after the excess roos are eliminated. Cost and time are the only real factors. A convenient size for a large area to be fenced in (because of some trees and a nearby barn) is about 40x80. Is it worth it? Would such a large area translate into any feed savings? What would you do in my circumstance?