Nope, it has nothing to do with alignment. It has more to do with the balance between fat and muscle. Too much muscle and not enough fat = nasty looking wolf. No muscle and no fat = nasty looking wolf. I don't remember the exact percentages, but keeping muscle around 70% and fat anywhere between 40 and 50% seems like a familiar count to me.
Now that I think about it though, I think that if you have an evil wolf, the balance of muscle and fat is a little off-set. Good has no effect.