We got 2 Buff Orpington day old chicks and I have a question about one of them. She had feathered legs! The other one has smooth legs and is much larger. They are 4 weeks old now and the feathered leg chick still has a LOT of her down with just a few feathers. The others...6 in all...have almost all of their feathers with very little down and are just about twice the size. We got them from a local feed store that has them shipped every week. Is it possible that it's not a Buff or is that simply a variation of the breed? Thanks!