I feel funny critiquing this, because I can't draw at all, but I can see where there are things that are "off".

There is something wrong with the angle of that near elbow. If you look at the way the joints work, the connection of the humerus to the scapula is more dorsal in real life than that elbow angulation allows for. You have almost a 90 degree angle at the elbow, and it should be more...maybe 120 degrees.

Also, the topline of the hips (croup) is too weakly muscled. The hind leg is good, but above the hip socket, the line is too shallow. If that were a real dog, I'd wonder about muscle wasting/neuropathy in the hind end.

Oh, and the neck is a bit short...lengthen it by about 10 -15%. Wolf necks often look deceptive because their coat is so thick, but this one you've drawn is in a summer coat and so you should be able to see more length of neck on him.

The feet are excellent...I love the way you've detailed the dewclaw on the far front, as well as the way the fur delineates the muscling and body contours in general.

Please don't take this the wrong way! I can't draw to save my life. I just think with a few tweaks, you could do an even better job.