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What Lies Beneath: A Commitment To
Understanding The Horse's Hoof

Written by: Kelly Counsell & Gayle Anderson

Professor Jeff Thomason of Biomedical Sciences at the University of Guelph has a foot fetish. For horse's feet, that is. He would have to be passionate to understand all there is to know about how horse's feet work: how the laminae stretch and strain under enormous loading; how the coffin bone and the hoof wall are married by these laminae - until death do them part; and how human intervention from rider to blacksmith affect this complicated structure. An engineering marvel, really.

A horse's hoof is composed of the same protein as human fingernails, but unlike fingernails, a hoof is designed to be the only interaction between the foot and the ground. "Not many animals run on their fingernails, and the ones that do have modified them extensively to do that," explains Thomason.

Dr. Thomason has dedicated much of the last ten years of his life to the study of horse's feet. Now with the help of Heather McClinchey, resident technician, the pair has developed a digital model of a horse's foot. Based on data collected in the field, the model is programmed to respond to the same kinds of force that the real foot experiences. As testing and fine tuning continues, the model appears to be responding as would a normal foot under the same conditions.

Thomason and resident technician Heather McClinchey have developed a digital model of a hoof that responds as a normal hoof would, indicating deformation and pressure points.

"We hope to create an accurate digital model that has practical applications," said Thomason. "With this tool we may be able to predict an individual horse's response to certain conditions, such as trimming, shoe type and gait."

Data collected for this project came from field studies, in particular a study at Sunrise Equestrian Centre, a therapeutic riding facility serving Guelph and the surrounding area. The one-year study was designed to investigate the mechanics of the hoof and the strain put on it during activity before and after a visit with a farrier. Placing electronic sensors in key positions on the hoof and measuring the strain experienced by the foot at different levels of activity accomplished this.

The Sunrise study examined the careful artistry of their farrier Phil Robinson and showed that the trimming of the horses had little impact on the existing strain patterns. Thomason is curious to look at more dramatic shoeing and trimming practices in the industry, such as the hotly debated "long toe, low heel" hoof angle, and how it affects the mechanics of the foot.

The field study at Sunrise was a great example of industry working with academics for the benefit of horses. "The partnership with Sunrise was great," said Thomason. "They were happy to volunteer their horses, and we really appreciate their help because there was a fair time commitment on their part."

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***Professor Jeff Thomason collects hoof strain data in the field with horses before and after a visit with their farrier
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Field studies are not always glamorous, requiring extra work and presenting challenging situations for both researchers and the participating farm or trainer. Yet Dr. Thomason has always valued the data that can be gained in field and has worked with industry farriers in the past. From 1993-1996 farriers Anne Negri and John Staples collected measurements on the feet of over 150 thoroughbreds in training. This database is housed in Thomason's office and contains very useful measurements of hoof shape that can be applied to the digital model.

The Equine Program at Guelph is looking to the industry to support their research, and working hard to provide the feedback and practical information the industry needs.


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