When I first viewed this photo I was attracted by the filter used, the unusual angle and the colors captured. Then as I looked closer into it I could almost hear the wind following behind each step like in a slow motion movie. I could see each muscle flexing in the horses leg as it stepped. And this my friend is what I enjoy in equine photography. Capturing the pure essence of the horse.
There is nothing about the photo I would change. You did a great job of not cutting of the key joints and not clipping the nee of the leading leg. One of my many favorites from you. Great job!