Study Evaluates Unintentional Weight Loss in Horses

Researchers pinpointed a definitive cause of weight loss in 60% of evaluated cases.
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Unintentional weight loss in horses is frustrating to both owners and veterinarians, especially when the horse is still eating well. Numerous causes are possible but often difficult to pinpoint. Due to the lack of descriptive information on this condition, a group of Irish researchers recently set out to establish a link between clinical findings and outcome (survival vs. nonsurvival) of horses.

"Even when establishing that a horse’s appetite is normal, there are management conditions to consider; these need to be ruled out before jumping to disease conditions," relayed researcher Lisa Katz, DVM, MS, PhD, DipACVIM, DipECEIM, MRCVS, a lecturer in the School of Veterinary Medicine at University College Dublin (UCD).

In their retrospective study, Katz and colleagues evaluated medical records from 40 horses presented to the UCD Veterinary Teaching Hospital between 2002 and 2011 for investigation due to weight loss despite a good appetite.

Sixty percent of evaluated cases received a definitive diagnosis (nine through post mortem evaluation), while the remaining 40% were classified as idiopathic (of unknown cause) weight loss. Of the cases with definitive causes, the team reported that "the mechanisms of weight loss were predominately inadequate absorption/increased loss of nutrients (due to conditions such as inflammatory bowel disease or intestinal lymphosarcoma) followed by increased nutritional utilization (due to infection)

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Casie Bazay is a freelance and young adult writer, as well as a certified equine acupressure practitioner. She also hosts a blog, The Naturally Healthy Horse. Once an avid barrel racer, she now enjoys giving back to the horses who have given her so much.

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