All my pullets have started laying and I have been checking on them regularly. I have only one Ameraucana and she is not laying blue-green eggs. I have watched her several times now go lay a tan colored egg that sometime has brown spots. All my other chickens are laying the correct colored eggs for their breed but her. I try to free range my chickens at least two hours everyday but if I am home I let them out all day. She is eatting and drinking just fine. I give them some scratch grain once a day when I am getting them back in the coop/run area. They always have fresh water and chicken feed in the coop. Does anyone know why? I don't know if this helps but she lays a double york egg at least once a week.