I'm going to build a coop for my Seramas, and I was wondering what size it should be if I wanted to keep 10. I know I want it to have to sides/or split in half, and have my Roos on both sides with their own hens. So I don't have any fighting. But I wanted a rough idea of what size it should be. I don't want it to big because I have a smaller yard, town house yard. But big enough to house atleast ten. And should I have a nest box for each hen?