could someone give me step by step instructions on how to vent sex my chicks? They are 3 weeks old, and I'm beginning to suspect one is a BOY!!! sigh. I'd like to know for sure though, so I can start preparing the little sibs for the fact that I will be selling him, if its a him. All I have ever heard about it is that you "squeeze 'em until the 'green stuff' comes out, look at it, and you can tell if its a boy or girl." I am guessing I'll need more info than that. Is there anyone who can tell me? Thanks!