It seems to be coughing and gasping for air. She makes a sort of interruption of a cluck sound that is not voluntarily tonight in the coop where they sleep. Then I see her with her mouth wide open to breath. Almost like they do when it is extreme hot weather. Weather right now is perfect. 70's. Two nights ago we had a short hail storm/rain. The hail fell for 5 minutes and rain for 15 minutes. Most the coop is covered and a small bit above where they sleep has a small opening. Like a seam split. So enough for the one sleeping on that side to get wet, unfortunately. Maybe it was her. I checked all their crops and they are sufficiently full, but hers is significantly less full. I pulled her aside tonight and put her in the small coop I had that is like a little chalet. It's made of wood and metal so I do hope there is enough air for her to breath in. Just figured to separate her to keep the other girls safe too. I do hope this is nothing serious.