Somebody is systematically poisoning the dogs of Hermosillo, an industrial city in northern Mexico, and not just strays: At least 64 dogs, all with owners, have died of a similar poison since mid-March. More stray animals have probably been killed, but had no one to file a complaint, authorities say. An organic phosphate compound, possible an insecticide or rat poison, apparently was used in most of the cases, and local media have dubbed the pers…