Clarence Sitzman, DVM, Dipl AVDC grew up in nearby Greeley on a dairy farm with his parents, one brother and two sisters. he graduated with a B.S. in Animal Science from CSU in 1972, and with a Doctor of Veterinary Medicine in 1975. He spent one year as an intern at the animal reproduction center at Colorado State University.     After graduation, he married his college sweetheart Phylis, and they have three children, Ryan, Diana and Paul. (They are all currently in college, so retirement in nowhere near in the future). After the internship he started his own practice in Fort Collins, and has been in practice there since 1976. They moved into their current location in the spring of 1986, and did a major remodel and expansion in 1998.     As a veterinarian he acquired a professional interest in veterinary dentistry about 10 years ago, and has pursued advanced training in dentistry since that time. He receive referrals from the Colorado front range, the western slope, and from most of Wyoming. He is an active member of the American Veterinary Dental Society, and has been fortunate enough to have served as president of that organization in 2004 and 2005. In February of 2007, he received his diplomate status from the American Veterinary Dental College.     Some of his outside interests are music, gardening, racquetball and rugby, and watching the best team in the National Football League- the Denver Broncos. He is an active member of Timnath Presbyterian Church, where he sings in the church choir, and help teach some of the adult classes.

Gary Sides, PhD, is the beef and feedlot nutritionist with Pfizer Animal Health. He has been with Pfizer since 2003.     Sides has extensive beef industry nutrition experience, compiling 20 years with organizations such as Intervet / Hoechst-Russell Vet, Cargill Animal Nutrition and Moorman Manufacturing Company. Before putting his nutritional expertise to work for Pfizer and beef producers, Sides spent two years as a livestock extension specialist with Texas A&M University, located in Fort Stockton, Texas. Additionally, Sides was a research scientist with Utah State University. Based in Lima, Peru, he worked in the Andes Mountains above 14,000-feet elevation, studying the reproductive and nutritional characteristics of South American ruminants. He also taught at La Molina Agricultural University in Lima.     Sides' professional affiliations include the American Registry of Professional Animal Scientists and the American Society of Animal Science. He has coauthored numerous papers and technical bulletins on estrus synchronization, growth promotion in feedlot cattle, effects of antimicrobials on feedlot performance and morbidity, among other topics. Sides earned his doctorate in ruminant physiology and nutrition from the University of Wyoming in 1980 and both his Bachelor of Science and Master of Science from New Mexico State University-Las Cruces. Sides is a native of New Mexico and grew up working on family farms and ranches near Roswell and Magdalena.     He currently lives in Sterling, Colorado, with his wife, Colleen. They are the parents of four sons with whom he shares a great interest in hunting, fishing and sports. He also enjoys gardening and skiing.