Has there been previous discussions on the nature of animals in the new system? Most people seem to think that the animals will suddenly become completely different than they are today. Lions and tigers will eat hay, not meat, etc, but if you think about animal natures and the perfect system that exists in the animal food chain, it doesn't make sense.
What would a horse be if it had no fear of predators? His entire nature and raison de etre, is a grazing watching, fear based creature. Without that would he still be a horse?
Also, the entire world ecosystem would have to change too.
I can see making the animals so that they wont eat man, but I cant see a complete reworking of creation.