My old girl has a matching pair of thoroughpins, not particularly big though. They have never given us a moments trouble, and only one judge has ever commented on them. They are purely a cosmetic problem. She also damaged her DDF a few years ago, but there was no core lesion and after 3 months box rest she was fine again. However, she wasn't doing much more than hacking and having a whizz up the field due to also having bad arthritis.