[mr beer]

It sort of depends on what you are trying to achieve. You can have an animal attack which is annoying and dangerous (especially with gritty rules - deep carnivore bites and scratches are bad news in the tropics) but unlikely to result in an animal 'victory'.

That said, animals* don't usually attack groups of armed, alert humans. For good evolutionary reasons...the ones that are inclined to do that, all died.

* leaving aside things like the mosquitos mentioned above.