Very nice. My main bit of nitpick-y-ness has to deal with the right side [closest to the viewer]. The more humanoid limb is a bit harder to distinguish from the body than I think necessary-a bit more shadowing or contrast would prevent it looking like its sprouting out of the elbow of the canine foreleg. Also, on that same canine foreleg, the paw is a bit....smudged looking. A few darker shadows between the toes to delineate might make it look less blurry.
I hope this helps somehow. I really like the rest of the pose, regardless of the above paragraph. Congrats on how it turned out!