Alright guys. It's been a few days and I haven't heard anything one way or the other from the humane society on if they are for sure going to start an investigation or not.
Plan B: because I feel REALLY awful about what these animals are dealing with, I'm calling my 'twin'. (Not twins, we just have the same first names and it confuses like everyone) She helps run the local hoofbeats for hope with her mom, and is also our 4-H leader. I'm going to tell her what's going on, see what she thinks we can do about relocating them if the cops determine that we can, and then we'll get ahold of the sheriff when we have people ready to board these horses and dogs.
Wish me luck, I'm officially freaking out.