What are the space 'requirements' per chicken for standard breeds. They will only be confined to coop from about 10pm to 6am, and will be free ranged in the yard or a large run the rest of the time. And are laying boxes included in the space reccomended? I keep reading 2 ft per chicken, and then 4 ft per chicken. I know more is always best but just wondering. I don't have a ton of space to have a big big coop, mostly garden and trees.