I have 2 buff orps that started laying last week. Their eggs are flat brown in color. I also have 2 black australorps the started laying yesterday and their eggs are kind of a satin (shinny) appearance. Is this a breed trait or just a first egg trait? I don't have any buff orp first layed eggs to compare them to. They are so tasty my hens can't keep up with my eating habits yet. John