Really?! It's so good it looks like you've done this a lot of times before!! I can't imagine what will happen when you do this a lot of times... I think it will get so realistic that the horse will bump out of the paper and start to run around you!! Haha! XD
nice rendering, very crisp on the little details around the nostrils etc. What surface paper are you using? I can only get good saturation from sanded paper surfaces, the smooth stuff foxes me! Love Derwent pencils though, really easy to work with.