I was really confused at first at how a bunch of people would know about her killing a dog on her ranch, until I heard the story itself, which I didn't find particularly believable. Then when I started reading some accounts that made it sound like she was just mad that it messed up her bird hunt and was tough to train, and that multiple people had seen some or all of this, her coming out with the story for seemingly no reason made a lot more sense.
multiple politicians from South Dakota have come out and stated that this event was well known in SD political circles. It's also being stated that multiple people witnessed it. Personally, I'd love to hear from them and the family who's chicken's were supposedly eaten. Would clear up a lot, but I doubt it would change much one way or another.