Hello! I'm having a problem with my coop getting wet inside with heavy rain. It is covered and made out of plywood, however, I do not have any shingles on it or protective paint. The wood shavings are getting wet and I'm worried that now it is colder out, it won't dry out. Should I be concerned and change the litter right away, or is this normal? Any suggestions for keeping my coop dry would be greatly appreciated! Thanks.