Finding the dog a new home would be great! I always worry about dogs that go to the shelter for behavioral problems as this seems to be....because the problems don't always go away with new owners and then the dog becomes a "revolving door" dog, in and out of homes.

Perhaps this particular dog's problem is just that he is left outside and neglected by his owners and will flourish in a new home....that would be wonderful!

Perhaps a nice letter to the neighbors?