With the exception of a few scenes, pretty much any of the scenes where there was something other than a torso/head shot were CG. In particular, the CG "wolves" in the opening scene are very obviously added in. I didn't look at the credits, but both the CG and make-up look like Rick Baker's work. The wolves look like an evolution of the ones used in An American Werewolf in Paris - if they weren't, they were influenced by them. I like the fact that they actually used so much make up in this one, and it was pretty well done (I'm a Fangoria kid). I'm not knocking the effects in this flick, just saying I didn't feel they were among the best I've seen.
I guess CG is just becoming a little too prevalent, almost to the point where studios rely on it to make a movie. I mean, look at Spiderman - those movies might as well just have been 100% animated... Then compare that to Jackson's King Kong or even LOTR, the CG is also very well done in those in that, it doesn't disrupt my willful suspension of disbelief.