I heve never had a rooster, but the behaviour is what made me think it was a boy---it was just really different.---it seems to protect the other one---when I put my hand in it runs to the front of the other one and tries to block me from picking her up. She, ( the little one) is very quiet and docile, loves to be picked up, the bigger one can be a bit mean.... also big one hogs food and when it eats he makes a giant mess...when around the other chicks, it steps in the round bowl, eats from the far side, and when the others come near it pecks at them trying to scare them off. If i put a round dish in there it gets inside and acts like it is challenging anyone from coming near. So I was sure it was a boy----but they are looking more and more similar, so I wondered if the big one is just more aggressive and because of the size I assumed it was a boy---but was wrong? I keep looking for those stringy feathers, but they are all very rounded still....but the comb does have more texture---the main row in the middle, but on the outsides there are teeny bumps that look like possible rows. Thanks for your input, I do not want to re-home it until I am sure---reason I am being so impatient is I am headed to Idaho in a week, where the person is that wanted it if its a boy. IF it turned out to be a girl, and laid a beautiful blue egg I would be so ticked off haha! I hate to make two trips, but that big one seems to be trying to convince me this last week that is worth waiting to see what happens.
honestly knowing that it is doing that along with my other feelings i think its a boy. i have never had a roo so i am just going by what i have learned. i may not be right but i am thinking boy.