I am new to this and my chickens are 3 months old. I have two screened windows in my coop on opposite sides, so I was getting good cross ventilation thru The coop. But it's rainy season now and it was coming into the coop so I had to board them up. Now my only opening is when I lift the little door every morning for them to go into the run. Is that enough ventilation thru the winter? I also do the DLM and I'm finding the smell has been really bad. Any suggestions?