Evaluation of forelimb horseshoe characteristics of thoroughbreds racing on dirt surfaces |
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| Authors: | Gross Diane K Stover Susan M Hill Ashley E Gardner Ian A |
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| Institution: | J. D. Wheat Veterinary Orthopedic Research Laboratory, Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA. |
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| Abstract: | OBJECTIVE: To describe forelimb horseshoe characteristics of horses racing on dirt surfaces and determine whether these characteristics vary with region of California, season, horse characteristics, and race-related factors. ANIMALS: 5,730 Thoroughbred racehorses. PROCEDURE: From June 17, 2000, to June 16, 2001, the characteristics of 1 forelimb horseshoe of horses that raced on dirt surfaces at 5 major racetracks in California were recorded. These characteristics included shoe type; toe grab height; and presence of a rim, pad, and heel traction devices (jar caulks, heel stickers, heel blocks, and special nails). Horse and race information was obtained from commercial records. One race/horse was randomly selected. RESULTS: 99% of forelimb horseshoes were aluminum racing plates, 35% had a pad, 23% had a rim, and 8% had a heel traction device. A toe grab was observed on 75% of forelimb horseshoes (14% very low < or = 2 mm], 30% low > 2 and < or = 4 mm], 30% regular > 4 and < or = 6 mm], and 1% high > 6 and < or = 8 mm]). Forelimb horseshoe characteristics varied with region of California, season, age and sex of the horse, race purse and distance, and track surface condition. Log-linear modeling revealed that all of these factors were significantly interrelated. CONCLUSIONS AND CLINICAL RELEVANCE: Complex interrelationships among forelimb horseshoe characteristics and region, season, age and sex of the horse, and race-related factors need to be considered when evaluating the relationships between injury and horseshoe characteristics in Thoroughbred racehorses. |
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