The Horse

FEB 2019

The Horse:Your Guide To Equine Health Care provides monthly equine health care information to horse owners, breeders, veterinarians, barn/farm managers, trainer/riding instructors, and others involved in the hands-on care of the horse.

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Inquiries to: 859/276-6726 E-Mail: ERICA LARSON, News Editor @TH_EricaLarson 8 February 2019 The Horse | These are some of the main findings from a recent study in which British researchers investigated risk factors for horse elimination at veterinary checks during endurance rides. The team's study focused on data from all Fédération Equestre Internationale (FEI) endur- ance events held worldwide in 2010 and 2015—nearly 83,000 starts. Meanwhile, a race distance of more than 100 kilometers (about 62 miles) is associated with an increased elimination risk due to meta- bolic issues, such as cardiac problems, high temperatures, or respiratory distress. Hav- ing a male rider increases a horse's risk of metabolic eliminations by 82% com- pared to a female rider, said Euan David Bennet, PhD, a research associate at the University of Glasgow School of Veterinary Medicine's Weipers Centre for Equine Welfare, in Scotland. Ride speed also played a role in eliminations, he added. However, it was such a complex factor that the researchers carried out a separate risk assessment study on speed; find a recap on those results at TheHorse. com/164299. Understanding such risk factors can help veterinar- ians, riders, and trainers make informed decisions to safeguard endurance horse welfare, said Bennet. "Some of the risk factors are obviously unmodifiable," such as sex of rider or horse, he said. "But organizers, trainers, riders, and vets can take these factors into ac- count for the horses in their care. The first step is making sure the people involved are aware of the risk factors that apply to endurance horses so they can make more informed decisions about which rides to enter." These studies are the first in a series analyzing FEI endurance ride data, Bennet said. His goal was to "provide useful, actionable results to improve equine welfare," he said. Following numerous vet- erinary issues during endur- ance rides, Bennet's colleague Tim Parkin, BSc, BVSc, PhD, Dipl. ECVPH, MRCVS, had suggested such a project would be beneficial. The FEI agreed, and so began the ongoing research collabora- tion with the University of Glasgow, Bennet said. Bennet, who has a background in astrophysics, believes his scientific work outside the equine world has given him a particularly neu- tral point of view in leading this study. He said he joined the project with "no precon- ceived notions, which is as it should be. We let the data speak for itself." Read more at TheHorse. com/164245. —Christa Lesté-Lasserre, MA I f your endurance horse is a stallion, older than 9, and competing in a ride against more than 60 other horses, he's at increased risk of being eliminated from the race due to lameness. Risk Factors for Endurance Riding Eliminations Understanding risk factors can help veterinarians, riders, and trainers make informed decisions to safeguard endurance horse welfare. COURTESY FEI/MARTIN DOKOUPILW NEWSFRONT Bandages Could Improve Nerve Block Results Nerve blocks can be invaluable lameness diagnostic tools. By injecting anesthetics to numb a specific spot, they can often localize the painful area, allowing a vet to prescribe appropriate treatment. However, research has shown that the drugs can seep away from the injection site and numb more internal structures than intended, resulting in a less precise diagnosis, said Stine Jacobsen, DVM, PhD, Dipl. ECVS, of the University of Copenhagen, in Denmark. But she and colleagues recently found that applying a compres- sion bandage to the pastern before injections can help prevent diffusion of a radiodense drug simulating anesthetic use during palmar digital nerve (PDN) blocks, which vets use to numb the hoof. They monitored the drug's travel via X ray. With this study they established a technique for using compression bandages during PDN blocks; Jacobsen said more research is needed to determine if bandages can lead to better PDN block results. PPID: Not Just for Domestic Horses Recent study results suggest that wild equids—at least those in captivity—can develop pituitary pars intermedia dysfunction (PPID), just like domestic horses and ponies. Justine Shotton, BVSc, MSc, MRCVS, of Marwell Wildlife, in Winchester, U.K., and colleagues recently identified PPID in five Przewalski's horses, aged 7 to 29 years, and a 17-year-old Chapman's zebra. All six animals had high blood plasma levels of adrenocorticotropin hormone, which is elevated in affected equids. "One of my main reasons for publishing this was to make zoo vets aware of this condition so they could test for it early and treat if appropri- ate, before the development of (associated) laminitis, therefore hugely increasing welfare," Shotton said. STUDY SHORTS

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