I have 2 Buff Orpingtons that I got from my local feed store. I bought them together and they are about 3.5 months old. Within the last few weeks one of them has started to look more and more like a rooster to me. It's comb and wattle are noticeably bigger and more bright red than the other, she is slightly bigger in body size, and she is much more dominant than the other. Do I have a roo???