My thoroughbred has developed what I believe is a hunter bump(?) on his the lower region of his back where the lumbar vertebra are. I'm not quite sure if that is truly a hunter bump so i'm curious to everyones opinions. I have also noticed that he does get sore in his lower back and hind end region a lot.
The first photo I have is where I first got him and it does not appear that there is a bump on his lower spine. (the first photo is him with a bridle on and head is up)
The next photo was taken a few days ago and if you look very closely there is a bump there. This bump is more prominent with his head up. (second photo is him eating grass with fly mask on