She's a gorgeous girl! An appy and mustang cross... She could probably take a grizzly bear on and win, lol.
Well, here's my usual disclaimer- I'm not an expert, so if someone says I'm wrong, I probably am ;)
Her pasterns looks wonderful- short, strong, and the same angle as her shoulder. Her hocks look pretty round, but her canon bones are nice and short and she has excellent bone. She could possibly be either a tad straight through the hocks or sickle hocked, I'm not sure if it's just how she stands or not, though...
Her shoulder looks nice, more on the straight side I believe, and she has pretty high withers. I love her neck! It looks to tie in pretty well. She has a big, round barrel with a decently deep girth, a nice short back with an absolutely lovely hip and croup.
Overall she's very well balanced throughout her body with a pretty level build. I really, really like her!