We initially got nine banty barred rock chicks. Five of them turned out to be roos, and we let three of those roos go. The remaining chicks have grown and all about the same size now. You can see four of them in the first pic, all about the same size, same pattern (nice even stripes of black and white or white and black). A few days after the extra roos left, we got two more barred rock chicks from the same breeder, he said they were banties just like our others, and they were born about three days after the ones we initially got. However, after having those two for only ten days, something fishy has occured. When they arrived, they were both roughly the same size. Now, one of the newbies is HUGE! (Bigger than our original chicks are now!) She is also a total SPAZ who will freak out the moment she sees your hand come near her. The other one is barely bigger than when we got her, and she has a wingspan that is insane! She can easily fly out of the 2-foot high cage we have her in, to the point that I have to be ready to block her the moment I open the top! "Big Spaz" also has a different pattern to her feathers. (see the green arrow) They aren't in neat little rows like our others--more of a checkerboard-ish thing, and the tiny one with the huge wings has a similar difference. (You can see that one in the second pic also, right next to "Big Spaz"...there is NO WAY these are from the same hatching! What I am trying to figure out, is if they aren't the same as our original group (Barred Rock Bantams), what are they? They obviously aren't from the same mother themselves, because one is huge and the other is tiny. Sorry for the poo in the pics. I am working on a coop for them and right now they are on top of bricks over a cardboard liner.