Wow - that dust (cough cough) - I can almost smell it. Great stop action. I love all the natural colors. From an artistic point of view, I might crop some on the left to bring the horse a little to the left, but still showcase the cattle on the right.
Personally I would have cropped tighter on the left, so the horse's tail points to the bottom left corner of the frame, but that is only a nitpick on an excellent action shot!
Very nice. I think the only thing I might have done different is crop so the horse and rider are on the left side and capture a little bit more of the cows.