Why are dogs hanging around the perimeter of his house ?
odd.
I've had plenty of soi dogs walking by or even pregnant females having a litter of pups outside our backyard. I've no problem with that.
I wouldn't want a soi dog or dogs making themselves comfortable outside the perimeter of my property.
Perhaps someone is getting rid of scraps of food from meals and throwing them over the fence, we do that. However the dogs eat and move on.
I've got two dogs, golden retrievers, they bark and act tough when soi dogs are outside the fence.