ADVICEFROMTHE VET 8a 8b 9
The inside wall of this left front foot is upright. In this case,the foot is rotatedoutwards(toe-out, aconformation defect), altering the waythe hoof capsule is loaded.
The same foot as in 8a. The farriercompensates forthe abnormal foot conformation by shoeing with alittle extrawidth on the inside,sothe shoe acts to increase the loading angle down the inside of the foot.
10
The sole of this foot has been marked out to help assess
itssymmetry.The Xonthe frog marksthe centre, and is where thehorizontal line acrossthe widest part of the foot meetsthe vertical line between the heels and the toe. Ideally, the heel/toeproportions should be between 50/50 and 60/40 after the foot has been trimmed, and the distancefromthe vertical line to theoutside of the foot should be equal on either side of the line.
11
This is the same foot (left fore)shown in Photo8aand
8b.The photoonthe left is at the end of a6week shoeing cycle, beforetrimming. Thephotoonthe right is the same foot after trimming. Aftertrimming, the heel/toeproportion is closer to 50/
50.Trimming cannot correctthe abnormal conformation in an adult horse –the inside ‘half’ofthe sole is narrower than the outside ‘half’, because of the toe-out conformation. It is important to remember that although your farrier re-balances the feet each time they trim and shoe,the foot is adynamic structure–itisalwaysgrowing! The shape of the hoof capsule doesnot alwaysreflectthe position of the pedal bone inside it –toassessthisweneed to take x-rays.
12 13
Normal pedal bone alignment (lateral view).The angle between P3 and the ground should be 2-10 degrees.
14
Normal pedal bone alignment (dorsal view).The pedal bone is parallel to the ground, with the resultthatthe coffinand pastern joints areloaded symmetrically.
Upright or club foot conformation. The angle of the bonycolumn is very steep,increasing the concussion acting through the limb when the foot lands.
Broken back alignment, also called negativepalmar
angle.The backwardstilt of the pedal bone putsextra strain on the flexortendons and suspensory ligament even beforethe horsetries to push off from the ground.
PleasementionCentral HorseNewswhen respondingtoAdvertisementsWINTERSPECIAL2020 17
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