My chickens are 21 weeks old. I have 7 chickens - 2 barred rocks, 2 australorps, and 3 ameraucanas. I am getting 2 or 3 eggs each day. Twice I have gotten 4 eggs, all brown. Does this mean my ameraucanas are not laying yet, since I don't get any green eggs? Or does it mean my ameraucanas lay brown eggs?