All of a sudden my chickens have stopped laying. We normally get 8-9 eggs a day and yesterday we only got 3 and today only 2. The temperature has been in the 90s and very humid. We also added a chicken to our flock about a month ago, it didn't affect their laying at first so I'm not sure if that could be causing it or not??? I can't think of anything else that would be stressing them out. Does anyone have any ideas on what could be causing this??