Hello! I'm new to the BYC but have had my chickens for about 2 months now. We started the babies off inside about 4 days old and when they got to be about a month we transitioned them to the coop outside with a small heating lamp in the their plastic bin, we'd take them out for a little and place them back every night till well they got use to it and my other older chickens. As far as sexting goes I'm still clueless but can say I read up on things and I guess you might be able to tell on the feet, and the comb. Ugh, I am probably using wrong lingo here...sorry! Also as far as breeds go it can be tricky because baby feathers do change. You can post pics of the babies in one of the forums and I'm sure everyone would help out. Good Luck!!!