I am going to exchange a 4 week old rooster Bantam Millie Fluer D'occ.... (I can't remember how to spell it) tomorrow at a farm for HOPEFULLY a one week old hen of the same breed. I thought I got a hen the first time. How can I make sure I get a pullet this time. The farmer doesn't know how to sex them. She picked my first one out based on it being lighter than some of the others. Well, whoops - pretty sure its a rooster and I want to exchange it so that the new baby can acclimate to the bigger chicks i already have as soon as possible - so it will be smoother. How can I tell if its a girl or a boy at only one week. AHHH.