Heel-toe imbalance identified in toed-in horses

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pigeon-toeBelgium researchers unexpectedly found higher loading of the toe zone during analysis of hoof balance in five warmblood horses with toed-in conformation.

The researchers from the veterinary department at Ghent University used a pressure plate to gather information for the study.

Toed-in hoof conformation has been associated with an increased risk of lameness and shorter careers in equine athletes, presumably linked with changes in hoof balance, Maarten Oosterlinck and his colleagues reported in their study, published in the Journal of Equine Veterinary Science.

The research team set out to objectively evaluate toe-heel and medio-lateral hoof balance in five clinically sound, toed-in warmblood horses, based on data gathered using a pressure plate.

Five measurements of each forelimb were recorded at walk, and toe-heel and medio-lateral hoof balance of the vertical ground reaction force were calculated throughout the animals’ stance.

All horses presented higher loading of the lateral (side) zone at impact, while loading of the medial and lateral zones at mid-stance was more akin to that found in horses with normal conformation. Increased lateral loading was recorded at the end of the stance phase in both forelimbs in the toed-in horses.

Unlike in normal horses, higher toe-loading at impact was seen in four of the five horses, while one horse presented higher loading of the heel zone at impact in both forelimbs.

Limb loading symmetry was lower than that expected in sound horses.

The researchers said it was unclear if the toe-heel balance issue identified in toed-in horses predisposed them to lameness, or was a consequence of it.

“But it may be associated with distal limb lameness, as increased loading of the toe early in the stance phase has been associated with navicular disease,” they reported.

Oosterlinck was joined in the study by Roxanne Van der Aa, Eline Van de Water and Frederik Pille.

Preliminary evaluation of toe-heel and medio-lateral hoof balance at the walk in sound horses with toed-in hoof conformation
Oosterlinck, Maarten et al.
Journal of Equine Veterinary Science
DOI: http://dx.doi.org/10.1016/j.jevs.2015.06.001
The abstract can be read here

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One thought on “Heel-toe imbalance identified in toed-in horses

  • May 9, 2018 at 12:29 am
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    My guess…they have no clue that bar distortion is responsible for this condition. When the toe becomes too long and the heel is underrun it creates unnatural pressure that distorts (curves) the bar. This bar distortion creates pressure at the center of articulation of the coffin joint. Often the bar will sustain a vertical crack in this location. That crack can allow pathogens to enter the blood stream causing infection in the joint, but more importantly the condition creates weakness to heel support and pain. When, for example the lateral bar has sustain greater damage the horse will point the toe inward to remove weight from the lateral heel to avoid pain. When both bars are equally damaged the horse will compensate with a flat or toe first hoof-fall. A simple visual check of the bar will verify this. Most methods of correcting the heel do not correct the bar, therefore the horse never reaches a full recovery.

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