Friday my neighbor moved the main herd from one 15,000 acre range to another of about the same size. I tagged along just for the fun of it. It was an easy job since the oldsters pretty much knew where they were going. I also think they wanted a crack at the nice, untried grass on that side. It's interesting to watch their millennia-old habits come to the fore. The bulls naturally gravitated to the front, flanks and rear of the herd and stayed there. Some of the newborns had to run for quite a few miles and were tuckered by the end of the drive. Watching 6000+ of these very large critters move so easily across the Plains is a great sight. One I never get tired of. But it's still hard to imagine millions in a single herd.