Our Barred Rocks will be six months old the end of August. Out of 11, we have one boy and 10 pullets. We get six eggs every day. So, does anyone know why four are not (apparently) laying? All of them are in a Lowe's shed (with doggie door to a run) at night and free range all day long. Some are laying in the coop and some are laying in pine straw near our house.