LOL...Well I have read that but I did get a surprise boy. When I first started, I only had light skinned turken girls. No turken boys at that point. I had a broody hatch out a dark skinned boy and I could never figure that out. His sister also was dark skinned. So the rooster had to be a silkie in order to get the dark skin since I only had light skinned girls at the time. So, I had read that you could sex link the F1's by the girls being dark skinned and boys being light this way but I sure got a surprise when he started to crow! LOL So in my experience, I do not know if that is a 100% thing to go by. I have learned to wait a bit now to be sure and so far only that one boy popped out dark skinned from this type of breeding but it sure has put doubt in my mind!
Well shoot............Not a thing is 100 % except mathematics.
Most likely I will use this idea to keep my males with lowest amounts. I do not like to have to find new homes, have fighting cockerels and dispose of the casualties. I just needed to put down my seriously injured beautiful BLR/NN