Long back, weak coupling, right front is bench knee'd, small round hocks, puffy hind fetlock joints and her hind legs are camped under due to poor angulation and her very long back with a weak coupling. Her shoulder angle is good but the point of shoulder to elbow is very flat. She is not cow hocked. A horse's hind leg is a spiral and for the stifle to clear the belly and the hind leg to work properly, a horse needs to have her hind toes point out slightly. Toes that point straight ahead are a weakness.
She has low hocks (which is good) and adequate bone. Her neck ties on to her shoulder fairly well. Her head is weak.. she seems to have inherited the large jowel of the Quarterhorse or Paint ancestors but the narrow muzzle of the Arab.
She could be helped TREMENDOUSLY by a lot of long trots up hill and cavelleti which would strengthen her underline muslces and allow her to better support that long back and weak coupling. It also might help her to stand less camped under. She will be a very difficult horse to collect and get working off her hind quarters. That long back and weak coupling concern me for her future soundness.
All that being said, it looks as if she has a WONDERFUL disposition. You had to get under her to get the shot of the back side of her front legs and a lot of really great looking horses would have gladly offered to kick your head off. LOL
IMO good disposition can make up for a lot of flaws. My first horse was.. less than gorgeous conformation.. and I had him for 20 years. He was long backed, steep shouldered, and had an osselet on his one front fetlock joint. In spite of that I rode him miles and miles. He won a 30 mile trail ride and even herded some cattle. When I was a kid I used to take him to a stream in hot weather and we spent the day swimming (and I rode him with a halter and a lead rope).
If Casey is like that horse, then the conformation is the least of your concerns.
There is something about the outside of a horse that is good for the inside of a man. ~Winston Churchill
) Dinosaur Horse Trainer