It's funny you say that about coyotes attacking pets and threaten kids and all that. When stuff like that happens in the suburb it makes the big news, oh my god a coyote attacked and injured and killed a pet. Have you ever seen a story about a coyote injuring or killing a lamb or calf or what have you? Nope. Talk about bias.
We have turkey vultures around here, but like you've said, they do their thing quietly and I've only seen them feed on dead, not kill anything. Your guys's black buzzards sound scary.