I received my Formex large chicken coop today. It says it's for up to 8 birds, and I only have 6. They are buff orpingtons. I put it together and it seems a bit small, but I'm not experienced with chicken coop sizes. I've built an attached, covered run that's 4x8 and they will be free ranging in the back yard most of the time. Their food and water will be in the covered run, if that makes a difference. If anybody is familiar with this coop, do you think it's large enough for my birds? Thanks.