I would have cropped in closer as there are some distracting elements of this shot. The object in the top right corner and the yellow dandelion steal attention away from the focal point which is the dog and the boy.
You've captured your subject's mood, but next time, perhaps capturing it with the subject in a better composition would make a stronger photograph. There is too much unnecessary negative space here, and the object(s) in the upper corner are very distracting. It's a great, emotive snapshot, but DPC generally demands much more for a higher score.. however, of course, high scores on DPC aren't exactly the end all and be all either, but I must, as a commenter, take the stance that it is what a submitter is striving for.
Not bad, good moment you captured there but the composition could have been better IMHO. The lower part of the frame doesn´t really have any purpouse I would have tried placing the dog in the lower right corner instead of dead center, I am not sure it would have been better but it´s just a suggestion on how you could have gotten a more pleasing composition.
Also I would have cloned out or cropped out that shoe or whatever that red object is in the top right corner, it´s out of place and draws the eye away from the main subjects. Same goes for the yellow dandelion (or whatever that is) close to the center in the bottom of the frame.
Anyway, not a bad shot at all but I think you can do better.