PETA

Just as a general rule of thumb, predators will normally leave other predators alone. Its just not energetically a good equation to have to fight to the death for a few lousey pounds of meat when a nice tasty non-violent herbivore is sitting around anywhere NEAR in the neighborhood. Which would you rather do for dinner? Order out for pizza or go mano a mano with a cougar? Animals aren't stupid. Neither do they share our highly developed sense of morality and ethics (at least in theory highly developed - one wonders sometimes). There is a difference between killing and murder. I submit that animals are incapable of murder. That trick Man alone knows how to play. As for the fabled lions - I suspect that was a fable and nothing more.