It would surprise me if these were dogs from the bust that lived completely in the wild for a couple years. Heartworms, at least in the Lowcountry, are almost guaranteed for untreated dogs. Cars and trucks would get the rest. I would bet that there are still dog fight assholes in the area that continue to abandon dogs.

It would be hard for me to shoot them too. I don't enjoy shooting coyotes because they are so dog-like.