Kathy, you'll find that the BBS Orps are very slow feathering. I thought Smoky was a cockerel for a long time due to that, plus her huge tree trunk legs. At four weeks or so, you will usually notice the pullets are nicely feathering and the males still have fuzzy or bare backs. Barred Rocks and RIRs are very different in their rate of development from these. They are so much easier, especially the BRs that you can sex at hatch!