The whites on the dogs snout and between the eyes have no detail. That means that part of the image is overexposed. Put another way, your highlights are completely blown out.
Composition wise the dog is kind of scrunched up on the right there even though the dog is the subject. It's good that there is some space for the dog to gaze into but in this case it's a bit excessive.
Unfortunately, the overexposure is not correctable in post process because there is no data retained in the overexposed parts of the image.