OK, I am really new to this chicken stuff but at what point does a rooster crow. I thought all roosters crowed. I am assuming that all of my chickens are hens, after all that is what the sign said at Tractor Supply. Only two of them looks different. The tail feathers seem to be going in the wrong direction. I'd post a pic but can't get this site to access "my pictures" only "my documents". Hopefully I will figure that out soon. Until then please tell me what I should be looking for that will help me figure out if I have any roosters.We've chickens for 13 weeks