Okay, before I start my critique; I really love the background in this drawing, it's really pretty and the colours are nice and bright! Okie then!
First of all, the back legs. The stifle and hock look like they need to be a bit more . . . bent? I'm not quite sure how to explain it, but hopefully you can understand. But to me they just look to straight for canine legs.
I think there should be a shadow underneath him/her in the water, but then again, it depends where the source of light is coming from. The shadow could be on the grass. But I'm not sure.
Vision: I love the background, But the grass is a little inconsistent Since the blurring in some spots and not in others. The rocks are amazing and detailed, But the shading doesn't make sense. The wolf has highlights more in the middle of it when the sun is toward the left, hence making the rocks look...strange. The back-legs on the wolf need to be thicker and less bony.
Originality: I think it's quite original. I have never seen those type of markings on any creature before.
Technique: Your technique is good, But you need to work on where to blur and how to shade.
Impact: Overall, It's colorful, and indeed quite amazing. You just need to improve on some things. I will give it a solid 4 stars.