Hi! I have 2 French black copler Marans that are 4 weeks old. In the first picture the 2 Marans are side by side and you can see the difference in comb size. I'm wondering if the one with the larger comb is a rooster? I can't have a rooster where I live and I have someone who wants him if its a rooster.I just want to be sure before I rehome it.