I was about to throw the ball for the dog when I snapped this shot

I would really like some comments on this photo and how I could make

it better. Thank you very much.

I know this is a candid shot so it's hard to change things now. The lighting, colors, contrast and DOF are all great. If I had a chance to do over I think I would drop down some to include the dogs jawline/sternum in the frame. The way it is I think I would crop out some of the space on the right side as it seems empty and gives nothing to the shot. just my 2 cents. certainly not meant to discourage you in any way...happy shooting!!