I have a red Dorking pullet, I think I got her first egg the other day. I have a red Dorking/buff silkie pullet, then I have a silver grey Dorking/buff silkie hen who lays like a champ...and hides in walls to avoid me taking her eggs. I have a red Dorking cockerel over the red Dorking mixes, but he hasn't even crowed yet. I'm hoping to be breeding him this spring. So no guarantees on fertility out of that pen.
My buff Ameraucana hen may still be fertile from my White Ameraucana rooster. Their babies come out in pretty shades of blue and black. I've got her in the hen house. She is getting put with a buff Ameraucana rooster in a week and a half.