We had a huge outdoor kettle that sat on top of an incenter made of stacked steel tractor wheels with the spokes removed. We would put wood in it and fill the kettle with water and while the fire heated the water to boiling we would shoot a pig just above the eyes while it was eating from a trough of grain and then hang it by the hind legs with the tractor and take it over to the kettle then dipped the pig for butchering. In a way it was similar to butchering a chicken, but on a larger scale.