I would have loved to see the front of this beautiful dog's face and possibly show some emotion such as a 'happy' smile or sad eyed face. Here, the composition shows us the back side of the head which does little to hold interest for the viewer because it lacks the emotion or visual interest that one can typically show with a facial portrait. If you capture an animal from a back view there has to be some dynamic action present like showing the dog in a ready to leap position as he/she watches a ball being kicked or the begging dog is watching someone preparing a delicious steak dinner. Including a dynamic action would have some interest to the shot. But as the composition stands now, all we see is the backside of a dog's head. What the dog's face might look like, we don't know. What emotion is on the dog's face (happy, sad, or curious), we don't know. Don't show the viewer less of your main subject, you need to show us more.
Good focus, lighting, and white background; but I think the shot may be leaving out some of the more interesting parts of the dog's face. The eyes can make a great focal point, and here my eyes don't really find one.