It's not just us granny - I read a good while back that 80% of the creatures on earth are destined to be eaten alive by something bigger or more capable. Also we are, in fact, omnivores - our teeth and digestive system bear witness to the fact and, despite what the proponents claim, neither a fully vegetarian, not, especially, vegan, diet is truly best for us. What is worst, of course, is too much, regardless of diet!
Mike