This is my second go around =) - Haha! My pups would never do this! Very nice portrait! I would only recomment some hlighlights (whiter whites) on him and burn in the over-exposed area on the tile (distracting some from his face. The reason I recommend highlights is because the photo has an overall grey feeling to it.
I like the B&W...it adds to the melancholy feeling in the picture. The dog seems sad, or lonely...or was he/she just waiting for the right time to devour the treat?