I agree, the chick on the right side in that last picture looks definitely like a pullet to me. The one on the left side of the picture may also be a pullet. The comb is pretty big, but that's not that unusual for Mediterranean breeds from what I understand, but it's not really pink. The chick in the first picture I would say is for sure a cockerel. The chick in the second picture I'd be undecided about. The comb is pretty pink, but not that big, I'd keep an eye on that one for a little longer before deciding whether it was a roo or not.
