I agree with the above post, especially the bolded portion. the way her hind legs are is a bit sickle hocked, and i wonder if her Sacro- illiac joint is aligned correcctly.
What you see you can't identify is she is straighter legs because her butt is high with the SI joint so prominent.
Have a feeling she would benefit from a chiro visit and from a vet prescribed medication to fix fore and hind gut ulcers...she just has that drawn-up look where her barrel meets her hind end...
Signs of possible gastric upset and ulcers. being she came to you like this and her racing picture and rehoming picture....
Get the vet to prescribe prescription medicine to heal ulcers, then watch closely as she may benefit from a acid reducer fed daily...
🐴...