These boys were all four hatched here on July 12, 2010. I'm getting ready to list them for sale but am having a little doubt since I haven't heard any of them crow yet. Since they are right at 5 months old I would have thought that at least a couple of them would have starting crowing by now. I don't want to get rid of pullets but looking at these four I'm 99% sure they have to be boys with those tail feathers. Anyone think they could be girls?