Quarter crack
Encyclopedia
A quarter crack is a term used by horsemen to describe a vertical
Vertical direction
In astronomy, geography, geometry and related sciences and contexts, a direction passing by a given point is said to be vertical if it is locally aligned with the gradient of the gravity field, i.e., with the direction of the gravitational force at that point...

 split in a horse hoof
Horse hoof
A horse hoof is a structure surrounding the distal phalanx of the 3rd digit of each of the four limbs of Equus species, which is covered by complex soft tissue and keratinised structures...

 wall at or about the quarter or widest part of the hoof. Quarter cracks are not an uncommon injury in horses worked extensively in horseshoes
Horseshoe
A horseshoe, is a fabricated product, normally made of metal, although sometimes made partially or wholly of modern synthetic materials, designed to protect a horse's hoof from wear and tear. Shoes are attached on the palmar surface of the hooves, usually nailed through the insensitive hoof wall...

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One of the horses who suffered a quarter crack was Big Brown
Big Brown
Big Brown is a retired champion American Thoroughbred racehorse and winner of the 2008 Kentucky Derby and 2008 Preakness Stakes. Bred by Dr. Gary B. Knapp's Monticule Farms in Lexington, Kentucky, he won his first five race starts. He was sired by Grade III winner Boundary, a son of North American...

, before the 2008 Belmont Stakes
Belmont Stakes
The Belmont Stakes is an American Grade I stakes Thoroughbred horse race held every June at Belmont Park in Elmont, New York. It is a 1.5-mile horse race, open to three year old Thoroughbreds. Colts and geldings carry a weight of 126 pounds ; fillies carry 121 pounds...

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