http://www.slate.com/articles/health_and_science/science/2015/06/monkeys_domesticate_wolves_investigating_baboons_and_gelada_monkey_in_ethiopia.html

During field research in Ethiopia’s Guassa plateau, Dartmouth primatologist Vivek Venkataraman encountered a remarkable scene: wolves and monkeys casually commingling. Why weren’t these Ethiopian wolves making little monkey meals out of the baby baboons? In fact, they seemed to do everything they could to avoid raising a ruckus, spending hours roaming through the large gelada herds foraging for rodents.