Colorado Serum Company was founded in 1923 and recently entered its fourth generation in family ownership. Specializing in the manufacture of quality USDA-licensed large animal biologicals, Colorado Serum Company's product line includes Serum Antibodies, Bacterins, Toxoids, Bacterin-Toxoids, Antitoxins, Spore, and Modified Live vaccines. Professional Biological Company specializes in the manufacture of quality USDA-licensed large animal biologics labeled for and sold exclusively to licensed veterinarians. Products include Brucella Abortus RB-51, Caprine Serum Fraction Immunomodulator, Clostridial Antitoxins & Toxoids, Clostridials with Tetanus, Tetanus Antitoxin & Toxoid, and Normal Equine Serum. Western Instrument Company manufactures precision engineered veterinary instruments including syringes, dehorners, restraints, O.B. equipment, balling guns, equine dental equipment, and specialty electronic devices just to name a few. Proud to feature products made in the USA. Colorado Serum Company's Reagent Division manufactures a line of laboratory reagents, animal blood products (pooled or individual), and tissue culture serums.