I would say the nose holes are little too big..... which makes it look a little bit like a horse rather than a wolf - nevertheless I like the style of it

I like your style, but the artwork has the wolf's neck extending halfway down his muzzle. It should end before the back of his jaw.

Also, the perspective of his muzzle appears to be wrong. The tip of his muzzle appears turned toward the viewer, but his eye/ eye socket makes it appear that his upper face is facing to the right side of the artwork.

You might also want to consider a sharper transition from his face / skull to his muzzle. They just blend together in this piece.