. The horse's foot and its diseases . eaction of paring the foot only the projecting portionsof the wall at the inferior border are removed, thepreserved parts of the plantar region resist themovement of retraction, and thus prevent its occur-rence in a transverse direction. Again, as the thick-ness of the Charlier shoe is greater than its width,it possesses a certain elasticity and adapts itself tothe successive movements of the dilatation andcontraction of the horny box, however limited theymay be. We may now refer to some special modes of shoe-ing, recommended as preventive of contracted he
. The horse's foot and its diseases . eaction of paring the foot only the projecting portionsof the wall at the inferior border are removed, thepreserved parts of the plantar region resist themovement of retraction, and thus prevent its occur-rence in a transverse direction. Again, as the thick-ness of the Charlier shoe is greater than its width,it possesses a certain elasticity and adapts itself tothe successive movements of the dilatation andcontraction of the horny box, however limited theymay be. We may now refer to some special modes of shoe-ing, recommended as preventive of contracted heels, 122 but which seem to us to possess inferior advantageto the preceding. We first find the unilateral shoe ofTurner, which, according to that veterinarian, re-lieves the foot from pressure upon the heels byplacing the nail holes on the toe and the externalbranch only. Turner recommends also the conserv-ation of the frog and that of the bars, and it isprobably to this that the success he has obtained bythat mode of shoeing is Fig. 13. Coleman recommended a shoe very thick at thetoe and thin at the heels, the toe being three timeas thick as the heels. This veterinarian thoughtthat by this shoe the animal was obliged to rest onhis frog ; at the same time the nails were driven inthe toe principally, so as to allow the dilatation ofthe heels. This shoe has no real advantages, andpredisposes to corns. 123 The bar shoe is of some utility when the frog iswell developed, by placing on that part the pressureof the foot, and leaving the heels free. But it oftenfails in contracted heels, because in applying it theseparts require to be pared down, in order to increasethe prominence of the fiog, and a condition is thusproduced which does not exist in contracted same may be said of the Charlier bar shoe. Theobjections stated and the reasons suggested are trueof all the various shoes designed to adjust the frog-pressure.
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