The neighbors across the street 'rescued' what appears to be a Chespeake/Akita cross that is evidently both dog and human aggressive. When he started coming on my property challenging me, I told the neighbor,. "The day that he bites me or any of my dogs is the day that he dies." I suggested an invisible fence and once it was installed we 'proofed' him. He still terrorizes all joggers, dog walkers, bicyclists but now it is from a safe distance. That's a good neighbor.