Is it possible to sex Buckeye Chicks that were born on Easter of this year? I noticed some seem to have a "dark" stripe down the back of their head/neck area? I read somewhere with RIR that this could mean pullet, but would this be true with Buckeyes? Or is it too late to feather sex them? If so the 2 different lengths would mean pullet and all the same length would mean cockerel right? Or can they never be feather sexed?