Er...Needs a more work I'm afraid. I'm gonna go ahead and critique, and I'll be including photo reference and redlines. Not necessarily 'red' though.

(Photos © To their respectful owners)
Blue words are links. Click on them.
First of all, the ears need to be positioned differently. They shouldn't be right at the top of the head like that. You can see
here.The eyes are far too large, you can see from the previous photo what a decent size would be.
The muzzle also looks like it has been twisted awkwardly as it's viewed from an entirely different angle than the head. I've redlined the head myself
here.Now take a close look at the tuft on the right (Your left) side of Jacob's (I'm a fan of Twilight, and from the dialogue I'm presuming the wolf is your version of Jacob) head. The tuft seems to be sticking out of his muzzle. I included in the previous redline for the muzzle where it should be. You'll also notice how I gave it the rest of it's head.

(Refering to how it is missing next to the eye)
Overall, the head is also a little too large in comparison to the rest of the body. It should ALWAYS be smaller than the wolf's shoulders. The neck should also be thicker, and wolves tend to carry their heads lower. However this isn't completely necessary and many artists, myself included, overlook it as it can be easier to make the wolf look, say, happy if they are carrying their head high. Redline -
http://i579.photobucket.com/albums/ss23 ... hBee/3.jpgThe back is curved too much, canines have straight backs. In your pic it looks similar to a felines. Here's some canine skeletons in comparison to feline ones.
Canines:
http://hippie.nu/~unicorn/tut/img/basic ... leton.jpeghttp://www.hot.ee/spiritedbrand/photos/ ... eleton.jpghttp://upload.wikimedia.org/wikipedia/c ... n_view.jpgFelines:
http://www.pictures-of-kittens-and-cats ... natomy.jpghttp://www.pictures-of-kittens-and-cats ... eleton.jpghttp://www.enasco.com/prod/images/produ ... 028619.jpgA felines spine is generally more flexible. They are capable of arching their backs. You'll also notice it curving inwards when they stretch out.
The tail continues on from the spine however I've checked your gallery on the main website and well, you seem to be making them stick out of the butt.

Here's another
photo reference, and you can use the past photos of the canine skeleton to see what I mean when I say it continues from the spine.
The legs...Okay, first things first. The dewclaw should NEVER be on the outside of the leg. Only the inside, it's like a humans thumb. Only since the dog doesn't have shoulders like us, it can't rotate it's foreleg like a humans arm. So the dewclaw is never on the outside. Also, no dewclaws on the hindlegs.
The forelegs are too thick and positioned rather oddly. A canine, or any four legged animal for that matter, would not be able to remain balanced in that position. They would simply topple over given they were able to position themselves that way in the first place. Realistically the legs should be parallel to each other. Be careful with the shoulders too, they should be a bit higher.
The hindlegs...I strongly recommend using photo reference to get them right.
http://www.dkimages.com/discover/previe ... 981446.JPG http://farm1.static.flickr.com/63/19513 ... 6bd1_b.jpghttp://www.dkimages.com/discover/previe ... 141076.JPGJust search 'wolf' on google or any other search engine for more photos.
The paws also need work to look like they are actually able to support the wolf, however once again you should use real photos to learn.
Some other useful websites to use are wolfphotography.com (This one features some rather interesting poses that the wolves are in, which you might want to reference from) and wolfpack-management.com. Be sure to give credit and preferably link back to the photo you reference from too.
Best of luck, and I look forward to seeing you improve.