I think Rudy is finally done. I may do some minor tweaking but I'm pretty happy with the results at this point. I kept to my original palette with the addition of some Crimson Lake for the mouse's ear and nose. I may give him some whiskers, too. Not sure yet. I did wind up softening the edges of the cat's fur and tail with a little white soft pastel.
Note: Tweaks have been completed and the first image has been replaced by the final. I decided not to add whiskers to the mouse. Rudy had enough for both and I felt they would be distracting.