Those incredibly sharp and pointy teeth that only exist in predatory animals today were naturally used to extract the sugars from those plants they are so happily chewing on.
It's a real shame God didn't make sure the dinosaurs could make it onto the ark before those floods. You'd think if they could get lions from Africa and raccoons from north America and kangaroos from Australia all on board, there should have been at least some time for the dinosaurs to get there.