Most dog films chase your tears with a slow death and a swelling score. Red Dog earns its feeling a different way, by treating one kelpie as the connective tissue of an entire town. Set in the iron-ore country of the Pilbara in 1970s Western Australia, it follows a wandering red dog who adopts a whole community of miners, truckers and misfits before fixing his loyalty on John, an American newcomer played by Josh…