If humans back then could kill it, what prevents a saber tooth tiger? A woolly mammoth is by far larger than the woolly rhino, and would so be harder to kill. Yet, a saber tooth could kill it. Saber tooths were built to kill large prey animals, unlike the tigers and lions of today( which will occasionally attack adults but prefer to stick to calves or sick rhinos). A saber tooth would be wary of attacking a rhino, simply because of the danger of the horns on it ripping it open.