I was posting asking about my 5 week old buff orp and if it might be a roo? After reading some older threads it is apparent they are very hard to sex, and some that were "for sure" roos turned out to be hens in the thread. Do Buff Orpingtons vary in their comb size and color? What other signs do you look for to tell sex? Here are some pics. The one in the foreground is the one in question. She has always been a bit bigger, redder in her comb and feathers and more outgoing.