After completing the right side of the dog's cheek, I began adding more of the long neck and chest fur. I also added the dog's whiskers and redefined the fringe fur along the muzzle/mouth. I enlarged the dog's left eye slightly so I hope I don't feel tempted to retouch it.
The color on this photo is a bit off, showing more reddish tones than on the original painting. I will adjust the final image as close as possible to the original but for now, I must get back to painting!