The first 2 are the same bird. It acts sweeter like a pullet but it's twice the size of the 2 barred roos. There are about 6 that are a lot bigger. And they have been since about day 4 or so. Was sure they were roos until started coloring out. Now I'm so confused. Kinda was thinking maybe they are pullets that are a jg mix..I might not give up hope on pullets for the first two pics (are they the same bird?). Pretty dark barring and the second one looks like it has a dark wash on the legs. Will defer to those that know more, but at 4 weeks the comb size on my BR pullet was similar to that and had me convinced she was a cockerel. But the comb stopped growing and her head grew into it. That said, there's definitely some wattle action that mine didn't have. Good luck!