Nail prick
Nail prick or quicking occurs in a horse if the sensitive hoof structures (usually the sensitive laminae) are penetrated by a horseshoe nail being driven through the hoof wall while shoeing. The nail creates a wound on the inside of the hoof wall. A close nail or a nail bind is the placement of a horseshoe nail so close to the sensitive structures inside the horse's hoof that it causes discomfort to the horse. The nail is not necessarily placed in the sensitive structures itself, but creates a pressure on the quick of the horse's hoof. Nail prick is also simply called horse shoe nail misplacement. Horse shoe nail misplacement has several names and the terminology is not always used with exactly the same meaning. It is also called to puncture, to pinch, to prick, or to quick a horse. Quicking or nail-quicked is used both for the actual penetration (pricking) into the area with sensitive tissue of the horse's hoof and about a close nail that exerts pressure on the sensitive tissue. Colloquially it is also called hot nail. Cause If the nail takes the wrong direction and penetrates inside the hoofwall it leads to bleeding and pressure inside