Her hooves aren't hideous. Glad you're getting them done, of course.
It will be interesting to hear what your vet says. If he or she is also a chiropractor, great! If not, I'd get one out.
I like doing two things before and after getting busy work done. I like to get the horse on the flattest ground available, and standing as square as the horse can.
Then I measure from bony prominences and/or anatomical markers to the ground on each side. Point of the shoulder. Hips to the ground. Croup. You pick. Everyone has their favorites.
I also like to have a horse stand as described and get up behind them and a little above and take a photo from back to front. I've been amazed to see how well this shows straightness, or not, and how every thing is related.
I hope you give us an update. Good luck with her!