Hi, I'm experienced with other livestock but am completely new to poultry. About 7 weeks ago, I purchased 8 light brahmas and 5 dark cornish day old straight run chicks. They are now, obviously 7 weeks old and are growing well. I plan on butchering all but two cockrel and keeping the pullets as layers/breeders. I can't find anywhere the age that male and females can be determined by feather/comb/wattle development. Some of the birds are getting bigger than the others now with more comb and wattle development, but I don't know if this is due to sex, or just differences in maturity. Any help would be great. I've read the Storey's Guide to Raising Poultry cover to cover, and have done some internet research, but I'm just not finding the info I need. I've been a member of a sheep forum for years, so I know that you just can't beat the experience of knowlegeable, helpful folks! Thanks in advance.