I have 11 BO's. 5 hens and 6 roosters that are now just about right at 17 weeks. I have noticed that ALL but one rooster are now sporting tail feathers that are speckled black and one hen even has a wing feather with this black speckling. This is not dirt is is actual coloring of the feather. Does this mean that they are cross breeds or is this a normal color variation in Buff Orpingtons? These pics are from a hen. I am also noticing some pretty significant differences in body size/type for one hen.