It's been done in the past, I was into bow hunting many years ago and read everything I could on the subject. If memory serves me correctly (back 50 years or so) I read an article in a magazine (should still have it some where) where a bow hunter killed an elephant with a bow. I believe the animal was under him and shot virtually straight down from a ledge, a safety factor for him I believe or maybe a good angle for a lung shot? The bow was in the 100# plus range and I think it took 3 arrows. John303