Once again, looking back helps us look forward. Oetzi carried a small flint knife. It was splattered in blood from an antagonist and Oetzi himself suffered similar slashing wounds. But lets expand beyond black thunderbirds and neolithic 'men in Black.' The Grohmann bird and trout, Marbles ring knife and several slipjoint trapper models are all usefull butchering tools. If you have a wire saw even large game can be butchered. Skinning does not require a Green River Buffalo knife. Fisting, or using a tool of wood or bone will work just as well.