Well my grandfather came down and saw our chickens. He said that his father told him that you can tell a hen from a roo by the bones in their vent....except he didn't say vent but the 2 bones will be spread more apart so it can lay an egg....He said that you can do this with any age because i said that i know that hatcheries use this method. So i decided to get my mom to feel all my chicks vents and they were all spread far apart!!!OMG just like u guys said with them on here! If they are, I'm gonna be so happy I'll explode!