Too much like man, huh? Raised in mud and filth?....yup, you guys are on to something. I guess it's no coincidence cannibals refer to man as "long pig". Cattle breeders have twisted bovine genetics for centuries, and yes the modern prize bull is as much a GMO product as Monsanto corn. Yes, the genetic alterations were done the old-fashioned Mendelian way with no gene splicing, just "animal husbandry". There are natural breeds of cattle, but they are not the ones used for commercial milk production nor grown for meat, other altered human-made breeds are much more profitable to raise. The Livestock Conservancy Heritage Cattle Evidently humans have been messing with cattle's genetics since the Neolithic era, so it's hard to say when and which cattle are a natural product. The bison indeed was, and still is pretty unspoiled, since no one has seen fit to improve on it much; all we had to do was not totally kill them off, which almost happened. They did try to mix cattle genes in after the 541-odd bison left alive were brought together, but the practice was abandoned. However the wiki article says that modern bison have only a small amount of cattle DNA left as a result: "cattle DNA that has been measured in introgressed individuals and bison herds today is typically quite low, ranging from 0.56 to 1.8%"