Hello, I have 13 hens. I have 4 hens that lay tan eggs. but all of them have all of a sudden stopped. they are a little over a year old. My Amerucanas and Marans and laying but when I go to get our eggs we have NO TAN EGGS! we never see them go inside to lay. it has been days since we have gotten a tan egg. I wonder why? it has been really hot here. 90 degrees this past week. are they too hot? we have fans in the hen house And they have access to water all day and TONS of shade. we have looked in the bushes and everywhere outside and haven't seen any tan eggs anywhere. Why have the tan egg layers stopped laying?