Board Thread:General Discussion/@comment-94.205.216.126-20130304160741/@comment-9548103-20130310195344

There is a power added under your powers tab. When selected, it says "Take on the Form of a Wolf." Activating it will turn you into a Werewolf. And the only way to become a Werewolf is through the Companions quests. You cannot be a werewolf any other way.