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Here's the redline--

The main issue is that the wolf's center of gravity is off, Sherlock. To express more of a running movement, it helps to lean the subject forward. Especially with the front leg in this position, the body's going to be angling forward, preparing for the next burst of movement.
With the subject aimed more forward, next it helps to arch the back, also to show the movement that your subject is expressing.
Here's where it really gets into changes, and the arched back will certainly help--
With a wolf's front leg that far back, the hind legs will need to come forward. There will be one hind legs planted, but it should come much more forward, even ahead of the front leg. The subject needs to be completely bunched at this point, because there's no other way that the front leg would be able to be that far back otherwise. What's actually happening in this motion is that front leg is being picked up off of the ground, and the hind leg is stepping in to take the dog's weight. With so much motion propelling it forward, if the hind leg isn't forward, prepared to take the canine's weight, it will just tumble over forwards.
Here are some run cycles of dogs that I find very helpful--
http://vintageprintable.com/wordpress/w ... motion.jpg
http://www.go-fast.org/albums/dino/a060 ... unning.jpg
http://2.bp.blogspot.com/_Y-Rr4pmf27c/S ... +cycle.jpg
Just keep in mind where your canines going, and what's required to get him there. It can be difficult sorting out legs when they're in such a tricky position, but if you just think of the step that will happen next, it's easier to imagine it. :3
I'd also suggest bulking up the head and neck, and raising the tail up to the backbone.
EDIT: Oops, forgot the redline. lD
Added now.