Fuego-Patagonia is an enormous territory of around 900 000 km, and archaeologically it is sketchily known. This chapter reviews published faunal reports containing information on butchering patterns as they are evidenced at different places in Fuego-Patagonia. It reviewes a few sites that could have been considered processing or hunting camps. The chapter focusses especially on the subject of communal mammal hunting. It excepts communal land mammal hunting to be a component of a logistically organized hunter-and-gatherer system. The guanaco meat utility model is an empirically constructed model that takes into account Lewis R. Binford's caribou and sheep models. The structure of the bone assemblage was measured against the combined meat and marrow model. San Julio, a recently excavated site is an open-air stratified deposit of guanaco bones. Bloque Erratico is a small guanaco processing site located on the gentle slopes of Sierra Carmen Sylva, in the steppe environment of northern Tierra del Fuego.