How hot does it need to get for them to stop laying? We are in MI, and the temps are fluctuating every couple days between 70-80. I have 24 layers, and am only getting 12-15 eggs. They are all pullets and were laying almost 2x that a few weeks ago. I can't figure it out! Yes, they do lay eggs elswhere, but I know of 3 nests, and search daily for others. Also, is there any way to encourage them further to lay in the coop? At this point, I would assume locking them in for a week would be detrimental to laying???