Well I am going to start cleaning up around the back of the barn and move the girls around so they can have more space. The maximum size of indoor pen I can have is a 16'x8'. I was thinking of having an outdoor pen that is 16'x24' or maybe a 20'x24'. How many does could I confortably fit in a set up like this? Also, they would have a door that they could come and go as they please. The only time I would shut it is if there was the really, really bad weather with alot of wind. Thanks in advance!