So right now, I have 15 week old chickens (standard size). They are in a huge run and coop, The run is all sand and their coop is lined with sand at the bottom. The coop has a front door, back door, and window (with a screen on it). So heres the questions- In the summer should I close everything? Leave a door open? Leave just a window open? What about in cold weather? When it rains should everything be closed? Or will it cause too much humidity? Sorry about all the questions! I'm a newbie!