I don't know why I find Sam's wolf so fascinating. But he is! Maybe its because he is the most noticeable since he's all black while everyone else are shades of greys and browns.
Also MTV interviewed Phil Tippet, who was the visual effects person making the wolves...
MTV: That's hilarious. Tell us about the wolves themselves.
Tippett: Well, we put a good amount of time into studying the behavior and the physical actions of timberwolves, and then multiplied that up to a 1,200-pound character, so that the weight and mass appear to fit properly into earth-specific gravity and all that stuff. Sam Uley is the big-kahuna wolf, definitely the biggest one. Each wolf is between 1,200 and 800 pounds, and a lot of that is on a shot-for-shot basis — Embry and Jared are the smallest. Sam is the biggest one, then Paul and Jacob are roughly the same size — Jacob is maybe a little bit bigger.
For the rest of the interview, click here.