I do really like this one. The sense of motion is well conveyed, and the shadows do add depth (although maybe you could have pushed the contrast a little more).

To make the shading on the wolves I went over with grey colored pencil. I am in the market for a new set. Thanks dude :)

Might want to try doing it with a full black coloured pencil for the sake of contrast in addition to the grey-- or maybe get some high-B woodless-pencils and use those for shading. -- Or that Palomino pencil, with wax in it, might blend well with coloured pencils.

Might also be worth trying-- colouring with the fur grain, or along with the volume of the shape that is being coloured, rather than just as a flat field of colour.

Nice flow!