I am new to chicken raising and I have two cochin frizzle bantams. One's feather's are frizzle, the other one is not. Within the past couple of days (they are 10 weeks old) one of them has started getting a red comb and waddles. I thought that they were both hens because of the lack of red in the combs/waddles - and then I read somewhere that they start to get red in their comb before they lay. Is that correct? When do they generally start laying?