one of the other threads I saw where there was still bone they realized it had to come off and they used bolt cutters to remove the bone from what it sounds like. and I agree its not likely for the skin to grow over the bone.
Bolt cutters????? I'm appalled that someone would do that to a live bird. Can you imagine the pain that it must have suffered going through having it's bone(s) cut shorter with bolt cutters?! Maybe it's just me, but that sounds more like animal abuse than anything else. There are times when the suffering of the animal must come to an end...