I believe coyotes and fox eat rabbits, mice and rats out in nature a lot. If not for being too many in number, I don't know why coyote and fox then try to invade man's domain and cause trouble to him. Don't coyote and fox still steal livestock or domestic fowl?

How many coyote and fox should be taken by man each year for the good of conservation? What are actually healthy numbers for coyote and fox? Do wildlife biologists even manage their numbers?