Damn! I really like this. I cant say for sure whether its the composition. technique, flow of the piece... but yea this is awesome! My only complaint is the upper right corner. Complete the sky and you've got a really good piece. The line weight reminds me of Da Vinci's sketch style.
My favorite, favorite part of this is the two horses in the upper left of the composition. The rearing horse helps emphasize the already incredibly lowered leader of the pack. It gives such a great energy to the focus, like a horse-gunshot.
homerun. well thought out composition and technique fits the subject matter great!