Eggcellent article! Very informative! You’ve given me affirmation on the size of my run. I started out free ranging my flock but lost every one of them to predators so now my new flock has a fully enclosed chicken run that is 2 part. The original run is 512 sq ft and the Extention is 191 sq ft. I currently have 18 hens so I know I have plenty of space for them but I like the Extention so that if I do have conflicts, I can separate without compromising space. We have 3 coops that we purchased from tractor supply but we also have plenty of roosting throughout the run. My plan is to build a single large walk-in coop that can house them all if they choose to use it. I have a couple that prefer to sleep outside in the rafters of the chicken run.