Earlier this summer our girls were all laying well. But I have not gotten an egg in weeks. We're in Ohio but it's still getting around 85 in the day and 60 at night. I did change over to Rural King layer but give them calcium, forage, etc. What could be going on? They are all 2 years old or less. We're in the process of expanding their area but I wouldn't think that would be enough stress to stop them all from laying??