Like just about everyone else we built our coop too small... It is 12 square feet inside and has a 20 square foot run attached. The chickens also get an hour or two a day of foraging around outside the pen, depending on work schedules and weather. Right now we have two chickens. I would like to get more, and am wondering how many I could keep in the henhouse if I added an expansion to the run. We live in CA and the chickens always choose to come out to their pen (it's covered) during the day. Even if it rains some, it never gets too cold and the run is sandy on the bottom and dry. So the house is really just for sleeping. Could five chickens sleep in it if I doubled the run space or is that too many? I am also considering making a second coop and run, but would rather just expand the pen if the birds would be comfortable. What do you think? Any advice welcome! I have a BR and an australorp and would probably get more of the same...