How much room is needed for large hens to comfortably sleep on their perch? I am interested in expanding from 12 hens to 50 and trying to design the new coop. Also, should all of the perches be at the same height or should they be in a stair step configuration? Thank you in advance for your comments. Also, I plan on a min. of 3 sq. ft. per bird inside the coop and 10 sq. ft. min. per bird for the outside run. I will probably be doing two large runs so I can alternate the use every few days.