One thing to know is that pullets can start out with tail barring, but those, if you see them, are usually extra long tail feathers and at some point molt out and she gets her tail black. My Phoebe was one of them and her tail black is good. Gracie has some barring in her tail at 15 weeks, but they are exactly what I said, more like rooster sickles and I see other proper feathers coming in with her tail black. That is one reason you really cannot cull out these till they are around 20 weeks old and know for sure what you're letting go.