I always wondered when Will was in his wolf form, did the black outs have control over him? Did he remeber anything that happen when the wolf spirit took over his body? Even when he was talking to the thugs in Central park right before he ripped the one guy's fingers off? I was just asking because when he ate the deer, he did not seem to remember anything at all???
But when Stewart was raping Laura he said "Why hello Will! Locked ya up, did she!" indicating that he was still in control of himself and his body. And earlier when he was transforming from human to wolf when he was driving to the estate and killing the guards he still seemed like "Stewart". So I wonder why "Will" apparently went away and another spirit took over his form. Then again, I think Will, like Stewart maintained control and was still conscious during the final fight because after Laura shoots Stewart, Will seems shocked that he's now become a wolf and the way he interacts with Laura indicates that he's still "Will." So I don't know what was going on.