We got a rooster Saturday and brought him home for our 7 month old Barred Rock hens. I have two. I'm planning to let one sit a clutch, hopefully she will. I checked an egg layed today and it was fertile. Thanks to backyardchickens and the pictures posted I can know tell which eggs are fertile and which ones aren't when I crack them! So starting today, well tomorrow she already layed today, I'm leaving the eggs in the nest. I'm so excited!!