This recent incident tracks very closely or similar to a spate of livestock mutilations that happened in the 1960s, as far as I know they have happened with some regularity for several decades.
Really strange, and nobody has solved them. They happen more often than is supposed, but there is nothing to be done about it.
It’s really weird stuff. I saw someone at the DM website commented that the bones were all broken, too. Is that true, or not? Very weird.