Profile: Colorado Serum Co. caters a full range of large animal biologicals, large animal veterinary instruments, veterinary diagnostics, specialty products, and laboratory reagents. Our biologic vaccines include anthrax spore vaccine, encephalomyelitis vaccine eastern & western and encephalomyelitis vaccine E & W tetanus toxoid. We offer instrument like Stress Saver® castration kit, x-tend sheep crook handle and diamond chip float blades.