Yaks are iconic on the Qinghai-Tibetan Plateau. They have occupied a special position in the herders' life and in local society. After the old yaks run out of milk, the herders would keep them in the drove instead of selling them in the market, which was often blamed by the environmentalists for exhausting the grasslands.
In our former MPhil student Zhou Tao's article "Yak and the Tibetans", through a general description of local culture, he explains the dynamic between yaks and the herders from an anthropologist's view. Click the picture below to see the whole article in Hong Kong Discovery (Vol 74), Anthropologists on the Road series.