Nice work! The shadow under the character may be a bit too strong (low opacity multiply layer would'vee been enough) but otherwise it's a great chice of stock and editing C:
Anatomically, I think the wings are too far up on the back of the wolf...its hard to tell because of the dark coloring, but they almost seem like they are coming off his neck. I think that the overall idea of the scene is very good, but there are some tiny things, like the way the shadows are over all of his feet instead of merely the far-sided ones that break the suspension of disbelief