As always, your brilliant use of color is mystifying in it;s own special way. The hues come out in such a reflective and almost glowing- and your sense of value and contrast is well demonstrated! I also really like the composition you have here, though I think it would balance it out a little more if the wolf was a bit larger. (Make a better use of space) However, if text were to go in the unused space, I think it would balance perfectly

The only other thing is what =Lyanti pointed out with the face, and I think the front legs / shoulders are throwing me off a little bit. I keep wanting to see them slightly longer... but perhaps that is a perspective thing.

Regardless, it's beautiful and I could see this little bookmark as a painting hanging on a wall! Keep up the fantastic work Pearl!

First of all, wonderful job on the colors, as I've come to know from your artwork. I enjoy the way you used the darker blue in the sky and the way you placed the rocks to help "frame" the drawing.
Your rocks have great form and you have a beautiful understanding of light and applying a light source to the picture.
You have a nice understanding of anatomy, there are just three things that I will point out.
First is the left shoulder. I think you just tried to fit it all into the picture.(something I've done before, sometime subconsciously) When in reality we would not be able to see the full amount of shoulder.
Second is the muzzle, and the lower jaw. I think that the muzzle is at the right angle, but at that angle I think on the right side of the face you see less of the lower jaw. I'm not the best at explaining things unfortunately. And I tried to find a face at that angle to show you but I couldn't find a good one...*sad*
Third thing was that the neck was a little to long.
Aside from those the rest of the body is fine, and I think you did a fantastic job on the paws. You did a great job making them more realistic.
Lastly I think it's great that you are giving the money from the Auction to a Cancer Patient. Way to be Awesome. ^^