Is predator-prey ecology in nature the way God originally created it?
No. Predator-prey ecology is not the way God originally created it. It was set up as a result of the curse, when one species began feeding on another. Creation was subjected to vanity in hope, and the curse will be lifted through the Redeemer.
Les teaches that as soon as the curse fell, present-day ecology was set up, so that one species of animal or bird feeds and makes its subsistence on another species. He points to wildlife examples such as the leopard stalking the deer or zebra, and birds robbing the nests of other birds, and says that is not the way God created it; it is the result of the curse. Les then connects this to Romans 8, where Paul writes by inspiration that the creature was made subject to vanity, not willingly, but by reason of him who subjected the same in hope. Creation is aware it was subjected to the curse, but the day is coming when the curse will be lifted. God came back and said He has a remedy through the Redeemer, through the Son, and through the seed of the woman.