Here is a short video of him.Kind of hard to tell from the photos, but what I think I'm seeing, is not full blown hard feathered vulture hocks, but a kind of soft feathered form of semi vulture hocks. Both I think, are probably an inheritance from some Cochin ancestry, at least it was in my birds case.
Not sure if the soft form is a DQ like the hard feathered form is, but I would not consider either a good thing to have in my breeding program.