Hi. We are building a coop and enclosed yard (run) for 6 hens. Is an enclosed 6 ft x 12 ft. yard attached to the coop plus space available under the coop (which is 8 ft x 4 ft) adequate for the hens to have? I plan to also let them roam the back yard but only when I am out there to supervise them/ensure their safety, so for the most part, they will be in the enclosed space. Thanks for the advice.