I have 7 hens and 1 rooster right now and we have had chickens for a year or so. I was getting average of 6 eggs per day and all of the sudden I am getting 1 or none daily. This happened once before during the summer but I found they had taken to laying out of the coop. I have searched all over and have not found an egg anywhere. Would anything cause them to all shut down laying at once??