Mandt's son also worked at the drive-in beginning at age 13. He later attended Marshall University and continues to work with the university as a sponsor of Marshall Athletics-a relationship that led to Stewarts becoming the “official hotdog at all sporting events. This still holds true today and are sometimes referred to as “Stewart’s Thunder Dogs” and are highly popular. John Mandt, Jr also expanded the business to do catering in the Tri-state region and also ships the hotdogs anywhere in the world. Today, John Mandt. Jr. and his children manage the business.