I am new to the Black Copper Maran breed ... my 5 to 6 month old hens started laying a couple of weeks now, so some of them use the laying box, some are laying on the ground. I wash the eggs before placing them in the carton in the refrigerator. I have noticed, on some of the eggs, that the dark brown color actually wipes/washes off! Is this common? If not, will it resolve on its own or is there something I need to be doing! Thanks.