 Cattle and sheep returned during the late Neolithic and Bronze Age.It has been argued that the pigs which remain on Gotland during the "Pitted Ware" phase are in fact wild or feral animals, implying a general return to hunting and gathering during this period and not just a reversion to marine resources.Examination of the helical fracture pattern and dynamic impact scars of the bones from the Ajvide Settlement suggests that bone marrow extraction took place at this site.