Has anyone has much experience with hens laying then hatching a brood? I have been letting my hens do so in hopes of increasing the number of pullets in my flock and keep the flock closed. Unfortunately for me, the percent roos in each brood is running 75% or more. Is this the norm? Is there anyway to effect this percentage to increase the number of females a hen will hatch? At the very least I would expect more of a 50-50 result in males and females, but this is not what Im getting.