I'll just stay inside the hut thanks. An animal that big will starve to death without anything substantial to eat. And by substantial I mean like elephants and shit. These animals needed a lot, and I mean a LOT, of calories to keep going. One month should be plenty of time for attrition to get the job done. If I have to actively participate in its death though, I'll just wait until starvation/illness weaken it to the point where it can barely move, make some spears by sharpening stone sticks, and stab it through the eyes until it stops breathing.