We are starting on our coop design. Have about two months to get it ready for the little ones, maybe less. We are planning to use pallets, since they are free. I'm wondering how big I need it for about 50 hens. I will put a separate part for my roos and one or two breeding sections in. I plan to free range my birds, but have a run for when I'm out of town and need someone else to let them in and out. That way they don't have to chase them. Also, how does everyone keep the coop cool in hotter weather. It's not uncommon for us to have 100 degree days alot! Any advice would be greatly appreciated.