I don't think so at that age. Sometimes they have suspicious looking tail feathers but they're still molting. They could fall out and not return. But I've only raised a Black Australorp cockerel. His sickles are just now evident, at 14 weeks, though his hackles have been noticeable since 12 weeks. My Barred Rocks were slower growing though. And I'm new, so you must take that into consideration ;-)