I have three EE's and they all lay about 5 to 6 eggs a week. They have been laying since July and one of them keeps popping out double yolks. That's not an issue. The issue is that they have been laying light green eggs all this time. I walk out there this morning and a big blue egg is sitting in the nest box. Blue as a cloudless summer sky! What the heck? I thought egg color didn't change!