Earlier today I read a post that stated hens subjected to blue lighting (like from aquarium light bulbs) will result in more female chicks being hatched. I have goggled, binged, and used other search engines but can't find much on this subject. I know the temp of reptile eggs can effect the sex of the offspring, I have no clue about any correlation in chicken eggs. If any one has any evidence for lighting or temps leading to more hens instead or roos being hatched, PLEASE post it. Seems like nearly all my birds that hatch around here are eaters, not layers!