I recall it worked pretty well when gray wolves were reintroduced to Yellowstone: https://www.nps.gov/yell/learn/nature/wolves.htm https://www.nps.gov/yell/lear

I recall it worked pretty well when gray wolves were reintroduced to Yellowstone: https://www.nps.gov/yell/learn/nature/wolves.htm https://www.nps.gov/yell/learn/nature/wolves.htm