Can anyone tell me which of these are a rooster? I hear one crow but before I get to the window he has stopped. He also doesn't seem to crow when I'm outside anywhere at all as my big rooster will. I got an egg from one of them the other day but not sure which. The brown one has been picking on the yellow one lately by pecking at its head. They seem to strut in front of each other a lot when they are roaming in the yard. The guy that gave them to me thought the brown one was the rooster. The yellow silkie seems to stand more upright though. I've only gotten the one egg 5 days ago. They are approximately 7 months old. Thanks ahead of time.