I have been told that you can tell the sex of a chick by how fast they get their feathers. I have 4 buff orpingtons. I thought I had 2 hens and 2 roos because 2 feathered a lot faster - the 2 that I thought were hens had little tail feathers a couple of weeks before the other two. Now, one that I was sure was a hen is the only one that is starting to get a little red comb. SOOO....can you really tell the sex of a chick by how fast they get their feathers? How accurate is that?