In case we aren't friends on FB, or you just missed it... LOOK WHAT I FOUND!
A small amount of additional interpretive info:
Red area: This is "the divot" where I dug out the thrushy junk after I cut off the folded-over bars.
Blue area: White line separation, recently beveled.
Green area: Weird hoof spot. This is the front edge of the scarred part of the hoof. The scarred wall tissue doesn't flare when it overgrows; it bends inward. The whole hoof would curve under itself here if I didn't keep after it. There was a small folded-over piece of hoof wall here (just over the white line, not impinging on the sole) that I cut off at the same time as the divot.
Anyway, I can't tell if this is the culprit for certain. He didn't strenuously object to me poking, prodding and cutting there. What he did object to was me trying to pick up the opposite foot to force this one to bear weight. So... maybe?