TDI, founded in 1976, is the oldest Therapy Dog Organization in the world. Our mission is visiting with our Therapy Dogs wherever they are needed. Therapy Dogs International is a volunteer organization dedicated to the regulation, testing, selection and registration of qualified dogs and handlers for the purpose of visitations to hospitals, nursing home, other institutions and any place Therapy Dogs THERAPY DOGS INTL IS DEDICATED TO THE REGULATION, TESTING, AND REGISTRATION OF QUALIFIED DOGS AND THEIR VOLUNTEER HANDLERS FOR THE PURPOSE OF VISITATIONS WHEREVER THERAPY DOGS ARE NEEDED.