Our Doctors

Gayle S. Leith, DVM, Diplomate ABVP, Certified in Equine Practice

Dr. Leith was born in New Jersey and grew up in California. She raises Thoroughbreds and Warmbloods. She competes in the amateur hunter division. Dr. Gayle Leith is a 1988 Wisconsin graduate, has a M.S. in Reproductive Physiology and is interested in medicine, lameness, and theriogenology. She has been with Arizona Equine since 1988. Dr. Leith is a Diplomate of the American Board of Veterinary Practitioners, certified in Equine Practice.

NOTE: December 2007, 2008 – American Association of Equine Practitioners – Dr. Gayle Leith presented “Buying into a Practice.”

NOTE: 2009 “Start – Up Problems in an Equine Relief Program on the Reservation – Getting the Kinks Out” also given at AAEP.

D. Scott Taylor DVM, Diplomate ACVS

Dr. Taylor was born and raised in Shreveport, Louisiana. He got his first horse, a Palomino named “Goldie”, when he was nine years old. He has owned and ridden horses for most of his life. He completed his undergraduate studies at Louisiana State University in Baton Rouge, Louisiana. He graduated from the LSU School of Veterinary Medicine in 1989 in the top ten percent of his class. Dr. Taylor wanted to specialize in equine medicine and surgery, so he completed an internship in equine surgery and lameness at the University of Missouri in 1990.

While in his internship, Dr. Taylor became very interested in surgery and sports medicine. He was fortunate enough to obtain a very competitive residency position at the University of California-Davis School of Veterinary Medicine. He completed a three-year residency in equine surgery and lameness at UC Davis in 1993, and became a Diplomate of the American College of Veterinary Surgeons in 1995. He joined Arizona Equine in 1993 and purchased the practice, along with Dr. Gayle Leith, in 1996. He has been a partner and treating veterinarian at Arizona Equine since 1993.

He enjoys diagnosing and treating lameness and surgical cases. His main interests are in sports medicine, and surgery (orthopedic and soft tissue).

If you want to know more about Dr. Taylor and his qualifications, go here.

Edward D. Voss, DVM, Diplomate ACVIMate ACVS

Dr. Voss was born and raised in Fort Collins, CO and knew at an young age that he was going to be a horse doctor. Growing up in and around Colorado State University’s Veterinary Teaching Hospital where his father, Dr. James L. Voss (clinician, researcher and dean for 44 years) taught, was an early inspiration and source of invaluable experience. After earning a bachelor’s degree in biology from Colorado State University, Dr. Voss attended Kansas State University’s College of Veterinary Medicine where he graduated cum laude – earning a doctorate in veterinary medicine and surgery.

Returning to Colorado after graduation from veterinary school, Dr. Voss was hired at Littleton Large Animal Hospital where under the supervision of lameness and surgery experts, he completed a formal post-doctoral internship in lameness and surgery. During this time period Dr. Voss authored several articles such as “Heel Pain, Is It Navicular Disease?”.

Following his internship, Dr Voss was offered a residency position in large animal internal medicine at the University of California at Davis. Advanced imaging, lameness/sports medicine and internal medicine training during this period under world class clinicians led to Dr. Voss being board certified in large animal internal medicine (Diplomate of the ACVIM) and brought him to Arizona Equine.

Over the past eighteen years at Arizona Equine, Dr. Voss has established himself as an expert in the fields of internal medicine and lameness. Dr. Voss has authored numerous book chapters, scientific publications and lectures periodically to the American College of Veterinary Internal Medicine, American Association of Equine Practitioners, Arizona Veterinary Medical Association, Texas Veterinary Medical Association, and others. Dr. Voss was on the AAEP board that first developed vaccination guidelines for horses and has served as an advisor to the grant review committee for the Grayson Jockey Club .

Currently, Dr. Voss has special interest and expertise in medical imaging (MRI, Nuclear Scintigraphy, Ultrasound, Video endoscopy and Radiography) and sports medicine (lameness, joint therapies, diagnostic techniques) as well as overseeing the internal medicine specialty (neurology, cardiology, infectious disease, cancer, foal care/neonatology, endocrinology, etc,) at Arizona Equine.

Tresha Robinson, DVM

Dr. Robinson was born and raised in Nebraska on a Quarter Horse ranch. Dr. Robinson is a 1999 graduate of Kansas State University Veterinary College and completed an internship at Arizona Equine. Her interests include preventative medicine, dentistry, reproduction and lameness. Dr. Robinson is certified in Equine Acupuncture.

Rick D. Howard, DVM, PhD, Diplomate ACVS

Dr. Howard, a native of Kentucky, is a 1989 graduate of Auburn University College of Veterinary Medicine. He subsequently completed an internship in Equine Medicine and Surgery at the University of Missouri in 1990. Dr. Howard completed his large animal surgical residency and received a Masters degree at Colorado State University in 1993. He became a Diplomate of the American College of Veterinary Surgeons in 1994. After completing his residency, Dr. Howard completed a doctoral program and conducted research in equine joint disease at Colorado State University leading to a PhD degree conferred in 1997. Dr. Howard was on faculty at the Virginia-Maryland Regional College of Veterinary Medicine at Virginia Tech from 1996-2003. In 2003 he accepted a position as an equine surgeon and as the Director of the E. Paige Laurie Endowed Program in Equine Lameness at the University of Missouri, College of Veterinary Medicine. Dr. Howard joined Arizona Equine in June of 2005. His major interests are orthopedic and soft tissue surgery and the diagnosis and treatment of equine lameness.

Dr. Cassandra Klostermann

Dr. Klostermann grew up in Dubuque, Iowa. Her love for animals and veterinary medicine started early from visiting her uncle’s farm and watching Animal Planet. She attended Wartburg College in Iowa where she majored in Biology and minored in Spanish. After graduating from undergrad, she attended the University of Iowa to earn her Master of Public Health degree. Dr. Klostermann attended Iowa State University for veterinary school where she spent much of her time working in the food animal hospital and volunteering in the equine hospital. When she’s not at the clinic, Dr. Klostermann enjoys playing and watching sports, hiking, and spending time outside.

Dr. Rebecca McOnie

Dr. Rebecca McOnie grew up in the Okanagan Valley of British Columbia, Canada. Her interest in horses led her to compete in three-day eventing, tetrathlon (through Pony Club), and modern pentathlon. She attended several Canadian Universities, where she played varsity sport and studied biochemistry. Rebecca earned her DVM with distinction from the Western College of Veterinary Medicine, Saskatoon, Saskatchewan.