I really like the clarity and the sharpness overall. It's pretty cool how you've framed it as well, although I feel that you could have allowed some more room around the frame or edges so that it wasn't so close to the paws or that the ears were chopped off... you could have used the rule of thirds in that sense.
The background is great in the way it separates itself from the main subject matter here. I like the contrast in colours and how it feels as if the area is shaded away from the bright sunlight and all.
The dog certainly looks relaxed there.. it's quite interesting. o.O