Roy is the "animal lover" of S & R, and his first words after the attack were, "Don't harm the tiger" according to his partner, Siefried (Larry King Show). Apparently, the tiger was trying to protect Roy after he slipped backwards and fell according to his partner.
I respect RK's wishes to leave PETA out of this, but (aside from S&R) magicians do not have a very good track record when it comes to the way we treat animals. We should treat all living things (doves, rabbits, etc.) with respect.