Does the horse look sound running around on her own?
There could be damage of course, but if she is otherwise sound, I don't see any reason to jump to a bad conclusion.
I tried to find a photo that showed my mare's hoof scar but this is the best I could come up with. It's her front right. It actually looks pretty impressive up close, it just barely shows up on a full-body photo. I didn't even have her vet-checked before I bought her, it was a take-her-or-leave-her type situation and she felt sound and they weren't asking much for her so I took a chance on her. I've been so very happy with her.
Anyway, I wish you the best of luck with the vet and please let us know what he or she says. Crossing fingers for good news!