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CAITLYN CABY
Caitlyn Caby was born and raised in southeastern Wisconsin with a lifelong passion for horses, growing up barrel racing and showing the all-around pleasure events on both local and national levels. She earned her B.S. in Equine Science from the University of Wisconsin-River Falls in 2021, where she was deeply involved in the equine program. Her educational path led to an internship at a leading breeding and performance horse operation in north Texas, where she gained hands-on experience in performance horse management, reproduction, and rehabilitation. This opportunity highlighted the critical importance of high-quality nutrition for horses at every stage, from breeding stallions and gestational broodmares to growing foals and elite athletes. Following graduation, Caitlyn moved back home to Wisconsin and dove further into the horse industry, working for several years as an equine vet tech. Her experiences in veterinary medicine reinforced her belief in the need for science-based nutritional solutions throughout the industry, as well as accessible nutritional resources for horse owners and managers. She now channels her knowledge and passion into her role as Technical Marketing Nutrition Specialist for Mars Horsecare US and BUCKEYE™ Nutrition. Outside of work, Caitlyn can usually be found trail riding through the backwoods of the Midwest with her two quarter horse geldings, camping, or enjoying live music. She also volunteers with her childhood 4-H club, and thoroughly enjoys helping local youth discover their passion for the horse world.
BRYAN CASSILL, MS, MBA
Bryan Cassill grew up in Southern Ohio where he and his family bred, raised and exhibited Quarter Horses. He attended college at The Ohio State University (B.S. in Agriculture). During college he was a member of The Ohio State University Horse Judging Team and continued to judge 4-H and Open Horse Shows in KY and OH. After marrying his wife, Heather, the two moved to Kentucky to attend the University of Kentucky. Bryan earned his M.S. in Equine Nutrition under the guidance of Dr. Laurie Lawrence. After finishing his M.S. Degree, he was hired as the University of Kentucky’s Animal Resource Manager for the Animal Science Horse Farm. He managed all aspects of the Thoroughbred Farm, Class Instructor and Mentor to UK Students developing into industry professionals. After the birth of his son, Bryson, he decided to pursue and earn a Master’s in Business Administration (MBA). Bryan was President of the KY Thoroughbred Farm Managers’ Club (KTFMC) prior to his move back to Ohio. In 2018, Bryan accepted a position at MARS Horsecare US Inc (BUCKEYE™ Nutrition) and is currently the R&D, Commercial, and Formulations Manager.
Dr. Pat Harris, MA, PhD, VetMB, DipECVCN, MRCVS & RCVS specialist Veterinary Clinical Nutrition (equine), EBVS European Specialist in Veterinary and Comparative Nutrition
After qualifying from Cambridge University, Pat completed her Ph.D. at the Animal Health Trust into the Equine Rhabdomyolysis Syndrome. She joined the WALTHAM Centre for Pet Nutrition (now Waltham Petcare Science Institute) in 1995. As Director of Science for MARS Horsecare and Head of Equine Studies Group at Waltham, she is responsible for their equine research conducted in collaboration with experts at institutes and universities globally. This provides the science behind the SPILLERS™, BUCKEYE™ Nutrition, and WINERGY™ brands. She is also a scientific advisor to MARS Equestrian™. Pat is a European Specialist in Veterinary Clinical and Comparative Nutrition, an RCVS recognized specialist in veterinary clinical nutrition (equine), and a British Equine Veterinary Association Past-President. She is also a member of several international society and charity boards and holds, or has held, a number of academic posts within various institutions around the world. Pat lectures internationally on nutrition as it affects the health, welfare, behavior, and performance of the horse. She is the author or co-author of over 500 scientific papers, abstracts, and book chapters with recent emphasis on obesity, laminitis, and senior horse nutrition.
Dr. Edd Knowles, MA, VetMB, MVetMed, PhD, DipECEIM, MRCVS
Edd qualified as a veterinarian from Cambridge University in 2005. Following a short period in small animal practice, Edd moved into equine practice where he worked in several roles, including as a hospital intern, ambulatory veterinarian, and internal medicine resident. He later became a specialist in equine internal medicine and the head of a large referral hospital.
Edd is passionate about clinical research and balanced his clinical work with research throughout his career. He has broad research interests in equine medicine, with particular interests in laminitis, insulin dysregulation, PPID, and equine muscle disease. Edd completed a PhD at the Royal Veterinary College in 2021, where he has continued with post-doctoral research into Box Elder toxicity.
Edd has published widely and frequently lectures internationally on equine internal medicine. He is the scientific chair for the British Equine Veterinary Association congress in 2026.
Edd joined Mars Horsecare in 2025. He oversees the scientific research portfolio and provides veterinary, scientific, and nutritional support to the BUCKEYE™ Nutrition and SPILLERS™ brands.