I have a Cochin chick I got at a swap.. I think he is 4 or 5 weeks old. Can you help me on his gender? These pics were taken just today! p.s their water is yellow from their antibiotics. These are from almost a week ago Now I have a buff brahma I also got from a swap. I'm guessing she's 7-8 weeks old? Can you help me here too? These pics were taken a week or so ago too.