When Ralph Helfer, now one of Hollywood's top animal behaviorists, first began working, he was shocked by the cruelty that was accepted practice in the field. He firmly believed in affection training -- that love, not fear, should be the basis of any animal's development, even when dealing with the most dangerous of creatures. Then Zamba came into his life -- an adorable four-month-old lion cub that went on to prove Helfer's theories resoundingly...