I have (6) 18 week old chickens. One is most definitely a rooster, big beautiful boy with a crow that will pierce your ears. He is a BA. We have another BA that is the same age as this boy, but looks much different and smaller. I assumed she was a hen, but "she" is crowing and her crow sounds exactly the same as her sibling! Same pattern, volume and tone. We also have 4 RIR that we were hoping were all hens. I have been hearing a crow that sounds a lot like our BA did when he first started crowing. Kind of raspy. It has a different tune, but definitely a crow. All 4 of these look almost exactly the same in coloring and size. Are the two "girls" that are crowing really not girls? I have read that some girls will crow in the absence of a rooster, but that isn't the case here, so I am really second guessing the sexes. Here is a picture of the to BAs to show the difference between the two.