Implying blame on the owners of these pets for a plague of predators way outside the scope of any natural population they would have in an area is also just off the rocker. We live in a modified environment largely of our creation, where many wild animal populations have long since slid from whatever would have in some distant past been natural. Culling coyotes in urban areas, where they can be a real danger to both pets and kids, is not some sort of grotesque ecological sin.