And I don't know who. I have 5 Black Australorps, 1 Barred Rock and 2 Americauna hens that are laying. I know the egg is not coming from the Americaunas because I get one green and 1 light blue egg from these two. But I don't know who lays the dark egg. It is like a 4 on the marans chart. Maybe I need to separate them to find out. Any ideas on this.