The grain-of-rice size microchips, implanted between the shoulders, hold an owner's name and address. Animal-rights activists hail the bill as a way to reunite lost pets with their families.
And it's not half bad. Even in a recession, Americans bow to the slobbering, shedding, fiercely loyal king of pets.
Western states grapple with how to address an increasing threat to livestock from wolves and big cats.