I have 7 week olds in a chicken tractor coop/pen attached with a tarp over it that doesn't really cover the whole thing very well, rain can blow in if they are out in the pen area. We have chance of showers every day, it seems.....yesterday I had them locked up in their coop most of the day as I didn't want to take the chance of them getting wet. I'm afraid to leave for the day and leave them out in case it rains. Please advise!!!!