Chickens are livestock as far as predation is concerned, and I'd want these folks to pay up. It doesn't replace those individuals, but hitting them in the wallet may help. Consider electrified poultry netting, from Premier1supplies.com. For perimeter fencing, 4' goat fencing (4" diameter openings) on steel posts, with electric tape on top, or four strand electric with a very good fence charger. That dog would find himself at another shelter, if they won't manage him. Mary