Okay maybe I'm insane but I'm starting to see a pattern and be able to sex my chicks when hey hatch based on the thickness of their legs. The chicks that hatch with thick legs from my last two hatches have all been boys, and the ones with slender legs have been girls. I actually marked the last batch to test it. Has anyone else noticed this? The breeds are all different andsome are standard and some are bantams but it always works for me. Kathy