I really like the forward look of this drawing. The way the dog is looking up at the viewer is powerful.
It seems like there isn't much variation in the color of the dog's coat, which is a little boring; even on dogs of a solid color, there are lighter and darker areas, and areas that have a lot of shadow. Maybe in the future you could add more shadow on the dog's neck right under its head and nose.
Your shading and fur texture are very good. This drawing has a lot of depth with how well the dog's shape is defined and how detailed the fur looks. I also really like how you colored in the black areas, like the nose, lips and around the eyes. They are shaded very well and are definitely dark in comparison to the rest of the picture.