I'm a newbie to the chicken world and can't tell if this is a rooster or a hen. The back tail feathers are long like a roosters. But the comb is small and actually almost looks deformed like it's smashed on his/her head. Also, in the morning I have heard crowing coming from the coop, but I don't know if it's this chicken or not. She is also the most aggressive of the flock. She is about 4 months old. Anyone have any idea if this is a rooster or hen? Thanks in advance for your help.