This is a long shot but I'll mention it just in case. I have 2 dark brahma bantam girls that are 6 months old. One has begun to lay. They were raised in my laundry room all winter and are extremely tame. However, I live in Va. and that's a "fur" piece.
Both of my pairs have started laying again. Both breeds are guaranteed pure and fertile. I have put 8 eggs in the bator and had all but one DB hatch, and it had developed for a while. So I'd say fertility is not an issue with my pairs.
My little black Silkie hen has started laying, too, but her roosters are not Silkies. If you decide you'd like some of my pure breeds, I will throw some of my Silkie's eggs in too.