I have one questionable chick that I am thinking is a roo. We bought 4 chicks at a feed store and were told they were all pullets but of course, no guarantee. Here "he" is. With the other 3 (we think the other black one is a mottled cochin, and two BO..agree?) The two cochins together (the other one has a tiny comb coming in as well) So, what do you guys think? Is he a "he"?