Ok here is kind of what i am leaning towards. I am wanting to build a coop (size yet to be determined) and put two runs off of it both being about 12 feet wide by about 21 feet long. I want two seperate runs with the ability to section off the coop itself so i can have layers in one side and meat birds in the other. When i dont have meat birds ( i only plan to raise those once a year) both sides of the coop will be opened up and the layers will have access to the whole thing including both runs. Considering the size of the runs can 40 chickens be Crammed into a 10x12 coop? Or is this pushing it? I am located in Kansas so the winters can be pretty cold sometimes. I plan to only have winter hardy breeds. Let me know your thoughts!