/b/veterinary-news/posts/13696 Sanofi-aventis and Merck & Co., Inc. announced today that Sanofi-aventis has exercised its option to combine Merial with Intervet/Schering-Plough, Merck's Animal Health business. The new joint venture will be equally-owned by Merck and Sanofi-aventisen-USTelligent Community 10