The colors help this image jump out of the thumbnail and grab viewers. The shading on the hills and sky are very smooth and pleasant. The wolf's markings are really cool, and I like your stylized "locks" of hair.
I would suggest spending more time on the shading to establish a lighting direction and define the roundness of the body. I think you are indicating light coming from the sun setting behind the subject with a bit of yellow on backs of legs, top of head, etc. But forward-facing surfaces are so brightly lit, it looks more like it is caught in a camera flash. You could try instead a sort of "halo" effect, like this photo: [link]
As I said in the beginning of this critique, you have an eye-catching image, which is job 1 on deviantART, and your pup is super cute. Well done!