I'm going to be blunt about this. I absolutly hate this shot. Considering that since you're on an SLR, you have tons of control for your depth of field and you didnt' use it towards your advantage. (In my opinion)
When I take shots of my dog, I have to use a fast aperture if I want to freeze anything. The only good shots i have of her are with my 80-200mm f/2.8 and they are all between f/2.8-f/4.5.
Another thing i've found is that shots which show personality stand out. My dog is very curious, so her chasing a dragonfly, jumping in the grass or just being attentive are key in my exposures.
Your dog looks great looking at the golden light shining on her, and the sharp contrast against the black is fine, but I personally believe that the shot would have come out better if you had isolated her from the foregound by using a quick aperture. The grass wouldnt' look so severe, and if you had gotten closer to her face, i think we would have a winner.
The camera tilt is really what does it for me. It doesn't look intentional at all and that coupled with the tight aperture give it that unfinished snapshot look, ala' point-and-shoot.