These are my first chickrns, so forgive me if it's obvious...but I cannot tell if this 19 week old barred rock is a rooster or a hen. I have a group of 12 hens that are 25 weeks and this one and 4 other "hens" were added a few weeks later and just integrating into the group. They won't even leave the coop when the original 12 are out in the run. This one has always been a little aggressive, and drew blood twice grabbing my hand when I was reaching down for something. But no crowing or other obvious behaviors. I just don't remember how my barred rock hen developed so I can't really compared them.