I have quite a mix of hens/pullets in my flock. I've only got a couple of hens that have been old enough to lay - the rest are just getting to that age. My hens (I have NO idea what breed they are) have been laying very brown eggs. Recently, my BO girls' combs have enlarged and turned red, and the last couple of days I've found a couple of very light tan colored eggs in the nest. I thought maybe my BO's had finally started to start earning their keep. I also have some RIRs, but their combs are still small and pink - though a couple of them have started getting a little bigger. I haven't seen any of the pullets doing the "egg squat."