Do remember that with older birds, they can have lost the back comb spike either by fighting or cold...so just be ause she doesn't have one now, doesn't mean she didn't have one originally.
Also, you want cuckoo coloring, not barring.
This is true, I hadn't considered that she may have lost it at some point. She also has very twisted toes...or at least the nails. I'm not sure if that's genetic or not.
Could you please explain the difference between cuckoo coloring and barring?