The images seem to be technically fine as far as focus and exposure. Which is more a function of the camera rather than the photographer. Composition, however, is 100% the photographer. That said, to create a more interesting and compelling images, try offering your viewers a unique point of view on your subject matter in a way your viewers don't often see. When you take a photograph from a standing aspect looking down at your dog, it offers nothing new to the viewer since this is the average way most of us see dogs. With that in mind, consider retaking this image of your dog but this time do it at eye level or maybe below eye level. Offer your viewers a unique perspective and one that your audience is not used to viewing the subject matter you're photographing will make for much more interesting image.