Next I'd make the eyes, and I really try and show more emotion in the eyes to show how hey feel.
Next I add the eye dots above the eyes, and the hair tuft.
Then I add the neck fur. Again, shape and size depends on the breed!
Now, I add the final details for the sketch, and start the Lineart on a new layer!
I usually either start with the nose or the muzzle, but since the muzzle is at an angle, I drew the muzzle first.