If I were doing the culling... I'd keep the 3 BO hens and the 3 RIR for sure... and of course the 3 silkies. That'd give you a rooster for the girls protection and 5 laying hens. The silkies would be your brooders.
From there... I'd sort through the rest of your flock and keep the best hens for egg layers. I'd eliminate any and all potential roos.
Use Process of Elimination!

From there... I'd sort through the rest of your flock and keep the best hens for egg layers. I'd eliminate any and all potential roos.
Use Process of Elimination!