so a few years ago i would say about 7 or so i had a book that the general story line was a girl (dark hair and features) in the night turns into a wolf and kills animals and then wakes up not knowing what had happened. I never got very far into the story but i do remember that the cover has a girls  face on one side nd the other half is a wolf and thats all that i really remember. i know there was another wolf that was following her around to that was light colored. I have been trying to find this book by googling the cover picture but NOTHING! if anyone can help..