Are all black sex link chicks barred and RIR mixed? I got mine from the pullet bin and she is not feathering hardly at all. A little bit on her wings. Not one tiny tail feather. I have noticed her comb is really growing! My chicks are a little over 3 weeks old. All the others have lots of wing feathers and their tail feathers are getting to where they're standing up. My white leghorn is growing crazy. I'm worried at roo got in the pullet bin.