Snowy and a new character, Tlak. Both being white wolves (Tlak's markings are minimal), I wanted to make sure that they could be distinguished physically, since I couldn't very well rely on markings alone to differentiate them. The fact that one's female and the other's male helped immensely, of course.
Coincidentally, these two could never actually meet like this -- Tlak comes from a later storyline than Snowy.
Tablet + Photoshop. Hours = what, five or something? Beats me, really, but it was only a few days of working sporadically.