Ok, I have kept tons of poultry, but am semi new to chickens, I have a brown layer, normally she lays good size brown eggs, only today she laid a white egg. I had just collected eggs, and she was alone in the coop so it had to be hers because she got in the box after i had collected and left me the egg when i was around to see that no other bird had entered the coop. Is this normal? could it be diet? crazy? my luck? or whats going on.