Hi Ken,
You may want to try a reverse s-curve on this to tame some of the contrast. Robert Amoruso has a tutorial here; http://www.birdphotographers.net/for...ad.php?t=20434
I would also consider cropping out the BG tree/bush....but it does then become a tight crop.....and that isn't to everyones liking. Love the stretch pose.
Tough light and angle (fully understand why) - but you gotta love the pose and expression on the dog's face. Definitely worth a bit of rework per the above suggestions.