I think it depends on the method of transformation in your fandom. If it comes from a more "scientific" or physical point of view, then you might have to consider what happens to the human or wolf's physical characteristics after every transform. If it comes from a mystical or magical point of view, I don't think there's anything to worry about.

Physically: I think since the human side only has hair on the head, it wouldn't affect hair patterns on the rest of the werewolf's body.

Magically: Yeah, those highlights might show up all over.