I have a red hybrid farm store girl in the flock, my only hybrid, dark egg layer, and had the most perfect eggs since she started laying last fall. About a week ago the color went crazy, then she shut down, then layed one the size of Jupiter, now they're every three days and dented, oblong, just crazy. She's healthy and happy and the rest of the flock is unchanged. It's not nutrition or disease or stress. Is this common???