This is basically it, and one of the reasons we need a separate (and generally accessible!) meat-source variable.
With zombie dogs & bears (possibly deer, wolves, and cougars too?), zombie flesh needn’t be human. Good odds it is, depending on your location, but not guaranteed. Likewise, some of the giant insects (centipedes, mosquitoes, wasps, maybe dermatiks, IIRC) butcher as Tainted, presumably as poisonous?