God demonstrated he could close the mouths of Lions, why not all animals.
Okay.
I'll bite. (Pardon the expression.)
Why would God create animals designed (teeth, jaws, digestive tract, many other features) to eat meat if they were never going to eat meat unless man Fell?
You cannot seriously tell me that you can look at a cheetah, so wonderfully designed to run down prey, and believe that God's original intent was for it to eat grass. Until Man screwed up God's plan.
Or maybe you can.