I've actually never drawn this pose before, so I may be off in a couple of places, but--

The first thing I notice is that your legs and back are REALLY big.
Even in that position, a wolf's legs shouldn't stick out that much. The fur from its neck, and overall mass of its body, will still cover up much of the shoulders.
The neck should be longer, and the head lower. The fur of the neck should actually be most of what you see, and then the slope of the rump. Showing a lot of shoulder is really awkward looking.
Also, from the position you have the eyes, it looks like the wolf is looking down. In this position, the nose should be completely at the end of the snout, rather than back up to show some of the mouth. If you still want to show some of the mouth, than the position of the eyes should be altered.
The ears looked a little big, but that's just personal preference. I didn't draw the hair in the redline, as I just don't draw hair on animals.
The paws are a bit too bulky, and the toes are oddly shaped. Wolf paws actually squish out quite a lot when they're standing, and the metacarpals don't show that much-- it looks too strained.
I didn't draw it since I always forget to include dewclaws, but the dewclaws should be lower down on the ankle, right before the metacarpal area.
The legs look a bit awkward in shape, and the elbows should be more defined.
The hind leg looks a bit shorter The thigh should still be pronounced, even at that angle, rather than just making the leg straight.
And feel free to ignore my edits on the little wings-- I'm just a nazi when it comes to wing anatomy. xD
Not really in the same pose, but still a valid reference--
http://lupinicious.deviantart.com/art/W ... e%3A1&qo=0Notice how tucked the legs are under the overall mass of fur.