I have a Buff Orpington who I though was hen, but now I'm not so sure. "she" just started trying to crow last week, and is about 10 weeks old. Here's a pic. Male, Female, or is it still too early to tell?
I'm certainly not an expert, but my three 13-week old buffs do not have combs and wattles that size. Mine have much smaller, less developed combs and facial features. I'm guessing rooster (emphasis on "guessing").