I don't know if this is the right section to post in but here goes... How do you know if you accidentally got a roo in with your pullets? How old are they when you can see a difference? My four week old chicks are doing just fine but I have noticed that one is a bit bigger than the rest and a little more aggressive. She (he?) is my little trouble making. I wouldn't mind having a roo but I just want to. Thanks to anyone that can help.