This is my Bielefelder, Pip, at 5 weeks. Lots of people said, "Yup, that's a cockerel. If it was your 'extra' chick, it might not even be a Biel, and lots of chicks have the chipmunk look."
Pip is definitely a pullet.
So is Robin. She wins the "biggest comb" contest, hands down.
She looks a bit demonic in this picture, but she's a sweetie.