This video segment from Nature: "Cold Warriors: Wolves and Buffalo" begins with wolves in full pursuit of a buffalo herd, and follows the wolves as they veer away from the herd toward two lone buffalo—one young and one old—standing in a field. The wolves then wait nearby for one of the buffalo to die. The segment concludes the next day after the buffalo has indeed passed away, and the wolves are feeding on its carcass. The segment suggests that the wolves sensed something was wrong with the elder buffalo and therefore waited for his death.
Learn more about the Nature film "Cold Warriors-Wolves and Buffalo".