The large one on the left. S/he is a Maran, 6-7 weeks old. Things that make me think rooster: Red comb, large size, load peep, thick legs Things that make me think pullet: Body shape, tail feathers, mellow personality. S/he is my only maran, the one behind her is a barred rock, so I can't compare her directly. They could be up to a week apart in age also.