My question is: could I have sex link chicks or Roos in here? I ordered 6 pullets but I know they can't guaranteed 100% accuracy on the sex, and Im wondering if I have a different breed mixed in here. So I got my RIR from MPC today. They are three days old. Here is a link to their pics here on the forum: https://www.backyardchickens.com/t/646055/baby-chicks-tomorrow/20 I did a search on the forum for RIR chicks and I'm a little confused now. I have 2 that are darker and more red, with the dark chipmunk stripe down their back, and 1 that has almost no markings and is a bit lighter. Then I have 3 that are more blonde colored, with what I am calling "swirls" on their back. One of the chicks with the stripe down the back has a very very light head, (her name is Dolly) and she is def the ring leader. .