<human>: My parents live rurally and have close neighbors who moved in a few months ago. They have avoided having very much contact with their new neighbors because they haven't heard very good things about them. For instance, when the old neighbors left the closing, they drove over to my parents house to apologize for selling to these people. Apparently during the closing, the husband and wife got in a very loud verbal altercation and were screaming obscenities at each other in front of the lawyers, real estate agents, and the couple whose house they were buying. 

A couple weeks after they moved in, my parents approached them about keeping their dog contained, as he is a very aggressive looking German Shepherd. I don't think they loved it, but they agreed. I'm certain that was part of why they bought a home so rurally--so they could let their dog run free. My parents also want to be able to hang out outside and let their grandkids play in the yard without worrying. 

Months later and and my parents are still going out to find the dog running around in their yard barking aggressively at them. The other day, my kids were over and the dog ran after them. It was pretty much the final straw. My mom called and left an angry message on their machine. Personally, I would've waited until I could speak to them directly, but it's done. They never have called back. 

They aren't sure how to proceed. They already had a conversation with them months ago and the dog still is let out. There's the angry phone message, which I'm sure will make things weird when they do speak. They've spoken to other neighbors and it's apparently been a problem with them too. One has had to switch her running path to avoid the dog because he barks so aggressively at her. Another is nervous to let her dog out because occasionally the german shepherd will show up in her yard and act aggressively toward her dog. 

My parents aren't sure where to go from here.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My parents neighbors have an aggressive dog that they let roam and they're scared to leave their home. Any advice on how to handle the situation is appreciated.