I have ten chickens, 1 Brahma, 3 Buff Orpingtons, 2 Barred Rocks, 2 Isa Browns, 2 White Rocks...I just went to check for eggs (Thrilled that we are still getting two or three eggs a day this late in the season) and found a white egg! All these girls have been laying brown eggs for over a year. I'm baffled! Has anyone had this happen?