We have a neighbor that we think has been trying to do SOMETHING nasty regarding our dogs.  Every now and then something not natural happens that is simply unexplainable without human involvement being a part of the picture.  Every now and then the hooks that attach the cable ties to the stakes pounded in the ground mysteriously become unhooked, or disassembled.  Sometimes we will let the dogs out on their cable ties, and when they come back in one of their collars is missing.  We will scour the yard looking for the collar, and it will be nowhere to be found.  Weeks will go by, and then the collar will reappear on our doorstep.