Excavators argue that these bones are from domesticated cattle, basing their claims on the reconstruction of the ecology showing conditions that were too poor to support large animals without human intervention, forming the basis of the Wendorf-Schild Model. Others have countered that an environment capable of sustaining gazelles and hares would have enough vegetation to support large animals like rhino and elephant, thus being able to support wild cattle as well. There is also no known ecological zone that contains only hares and gazelle, which suggests that faunal records of the area are fragmentary and incomplete.