Looks like just a pup. The neck is a little big for it, though, and as a suggestion, I wouldn't upload files this big. People generally aren't inclined to download pictures more than 200-300k large, if even that. This image could easily be half this size dimensionally and we'd still be able to see it clearly, and cranking up the JPEG compression a little would help decrease the file size as well.
That said, the picture itself is nicely drawn. The angle of the head and paws against the body is pretty spot on, though the forepaws look a little delicate for a wolf, and the head in particular is well rendered. Keep it up.
Nice wolfy. I really like his little legs. =^-^=