We got the "pan fry special" and there are mostly roosters and some hens. They're about 12 weeks old now. I'd like to butcher most of them and leave some to form a new small flock. There are only 2 hens, so I need to pick out one rooster. I notice that when I crow like a rooster, one consistently comes first to investigate. He's also first to run to the coop door to investigate any passing animal or weird noise. He has never been mean to me, but neither have any of the other roosters in that group. He's not the biggest, but he's pretty (he's a Buff), and his face is really red. Is this the one I should keep, or should I look for other qualities?