Horse Commission WIP

I'm almost done with my first commissioned painting and I wanted to post it to see if anyone had any creative criticism of the painting thus far. It feels like there's something missing, a shape, or angle or something. Any suggestions would be awesome! Oh, and the bush is just blocked in for now, that's why it looks so bad. XD

EDIT: the angle of the original pic made the legs look too short, so I took another one.