Neighbor problems...help

I hate situations like that. But I am a direct person and take things head on. Be sure you do not threaten them in any way. But I would let them know in no uncertain way that if they hurt my dog there is going to be a problem. Right now there is not a problem. But there are crazy people out there. I would probably get in touch with law enforcement. Let them know who you are and that there is a situation. That way if you have to call them because it got worse they will have a heads up before they get there. But if cops go knock on their door and confront them they may settle down. My BMC gyp rides with me all the time and I know there would be a problem if anybody threatened my dog. But I would call the law before it becomes a bigger problem. Just my two cents