So I have this bird critter in quarentine. It looks like a RIR. I was topld it was a hen. In the past month, it has developed a big red comb and wattles, They are bigger than the ones on my RIR banty hen, but no bigger than some of my other girls. She also crows like a rooster and does not lay eggs. I have a home lined up for this thing if it turns out to be a boy, but I would liek to tell the prospective owner soon if she is getting a new bird from me. What should I be looking for at this stage (adolescent) to determine whenter it is a hen or a roo?