:goodpost: Keep an eye on them. Expect your adult ladies to thump them for being presumptuous. Keep the one who learns those lessons and the adults hang out with in peace (the boys will be pushing a year). Also expect hormonal idiocy to start around 6 months. It typically lasts until the first...
I know someone who has lots of broodies and an incubator. If the eggs getting hatched are for her, 90% cockerel hatch. If they're for someone else (or someone else gets her eggs and hatches at their home), the rate is reversed.