If I say this people will think I'm kidding, but I learned so much about acting working with those wolves on White Fang. If I were to run Juilliard right now, I would make them take a class where they worked with animals. Animals don't know how to lie, so you have to just be with them. Whenever you act weird, or seem like you have an agenda, or are worried about what your hair looks like, they leave the set. They're not interested.