A pin-hole or minute sand-crack in the soil-pipe, or a very slight defect in a joint, is far more dangerous than a trap.
It becomes dry and brittle, and extremely liable to sand-crack.
In other words, a slipper shoe should be applied and the contraction given equally as much attention as the sand-crack itself.
Often, too, cracks will appear in the horn of the quarters, and a troublesome and incurable form of sand-crack results.
So far, our observations on the causes of sand-crack have referred to that form occurring in the wall.
Usually, the animal with sand-crack is brought for his inspection when lameness has arisen from it.
Unskilful shoeing also plays a part in the causation of sand-crack.
It is hardly necessary to say that, with accompanying conditions such as these, the sand-crack is a deep one.
The reasons for these positions being so affected we shall deal with when treating of the causes of sand-crack in general.
The clamp is then adjusted, and pressed home tight by means of the sand-crack forceps (Fig. 87).