Let me start by saying I am SO glad I stopped by this picture. I love the monotone color scheme, which works for the coloration of the horse and the prairie quite nicely. I also noticed that the anatomy on the horse is impecable, from something as simple as head size, to the delicate wrinkles in the skin on the neck.

One thing that did strike me as odd is how small the girl is in comparison to her mount, though that could be just that she's a small gal, or he's a big guy, or both! I also love the flow of the hair in his mane, but the hair of the tail looks slightly more rushed and sketchy. Still looks better than anything I could do though