We have plans to expand our flock of 4 Large Fowl to ~10 or 12, so I just built a Mid-Century Modern "post and beam" coop out of an IKEA bunk bed and storage unit (a modificaiton of THIS: http://www.ikeahackers.net/2009/06/ikea-home-for-chicks.html ). Now that it's done, I'm in a slight panic thinking our coop is too small!! Dimensions & Details The coop overall is ~8'x3' with a height between 5-5.5'. Each of two roosting bars has 45 inches of space, with one 30inch perching bar in front of the 3 elevated nest boxes. Food and water is beneath the nest boxes so as to remain clean from nightly poops. Our chickens range in a ~300 square foot yard area during the day, so this coop is JUST for sleeping and nesting. Regarding capacity.... 1) Can 10-12 hens comfortably live in such a setup? I have heard the "4 square feet per chicken in a coop" rule of thumb (in our 8'x3' coop that's 6 birds), but have seen some posts saying in general that a given coop size can house more chickens if it's just a nightly "crash pad." 2) There's space above these roosting bars - several feet of it, in fact. In theory I can install a second story of roosting bars over the first, with poop trays beneath them to protect the ladies below. Is this a good idea for increasing my coop capacity - building "up" additional accessible roosting space - or would it still stress the birds? Note that I can increase nesting box capacity by 1 if necessary, bringing the total to 4. THANK YOU FOR YOUR HELP!!