I did the fur texture, shading, and highlighting on Oscar's body today. I actually got a lot farther than I expected to. The idea was to put some fur texture on everywhere with a slightly lighter color, and then add additional texture and shadow by adding additional small strokes of a darker color. Same for highlights, just with a lighter color.
I'm not displeased with the results, though I think the first side came out better than the second. That's unfortunate because it's the 'outside' side, the side his head is turned away from, that's going to be more visible.