St.Louis is losing its most prominent advertising agency – D’Arcy, Masius, Benton and Bowles, after 96 years. The company’s main office is in New York. A spokesman says significant businesses losses are forcing the change. This is the company that gave us bhe Budweiser Frogs, the famous Coca Cola Santa Claus, the chuckwagon that was a symbol of Purina dog food, and such slogans as “This Bud’s for You,” “For the seafood lover in you,” and”The pause that refreshes.” In recent years the firm has lost the Coke business, and took a big hit when TWA was absorbed by American Airlines.