I had a silkie with angel wings. If I had known what to do, I likely could have corrected it when it was a baby.vulture hock is a DQ in most breeds except D'uccles that actually vulture hocks is part of their standard...I have never heard of a silkie being DQ'ed over vulture hocks because you can't really tell if they even have them.
Split wing is a DQ. Angel wing i've only ever heard of in ducks, and looks much like split wing.