sand crack

a crack or fissure in the hoof of a horse, extending from the coronet downward toward the sole, caused by a dryness of horn.

Also called quarter crack.

Origin of sand crack

First recorded in 1745–55

The simpler of the two is to merely apply the sand-crack belt depicted in Fig. 90.

Diseases of the Horse's Foot |Harry Caulton Reeks
It is hardly necessary to say that, with accompanying conditions such as these, the sand-crack is a deep one.

Diseases of the Horse's Foot |Harry Caulton Reeks
Often, too, cracks will appear in the horn of the quarters, and a troublesome and incurable form of sand-crack results.

Diseases of the Horse's Foot |Harry Caulton Reeks
The clamp is then adjusted, and pressed home tight by means of the sand-crack forceps (Fig. 87).

Diseases of the Horse's Foot |Harry Caulton Reeks

In this latter instance the sand-crack usually has its origin in a nasty jagged tear at the top of the wall of the toe.

Diseases of the Horse's Foot |Harry Caulton Reeks

sand crack

vet science a deep crack or fissure in the wall of a horse's hoof, often causing lameness See also toe crack, quarter crack