Yup, Leslie is correct, a small crop, some contrast enhancement (USM @ 20% 250px) and then some regular sharpening (USM @50% 0.3px) and this image will "pop"
This is a beautiful headshot of a beautiful head piece, Karl, but I think I ould have cropped some off the top to have the Airedale's head be and stay the focus rather than your eye wandering because of the spcae up top...JMHO.