I managed to tour a buffalo ranch on the Flint Hills during the summer. It was a particularly hot and hazy day, and the buffalo sought out a hill where the wind cooled their bodies.
The rancher was happy to announce that his ranch, unlike the one next to his, has its own source of water. He also disclosed that he uses chemicals to kill unwanted trees and weeds, perhaps not realizing that the chemical spray he uses will eventually end up in the water that he uses for his buffalo.