I am not sure because we have beautiful pullets (they aren't a year old yet but just starting to lay eggs..) and they don't lay blue eggs like we were told. I am very upset and confused about all of this. They are about 6 months and no blue eggs. We have for sure one chicken not laying. So the other day we got 16 out of 17 eggs because one doesn't lay and all there was, was 3 green eggs, 4 light brown eggs, and 9 brown eggs.