HORSESHOEING. 



173 



3. Calk Wounds of the Coronet. 



All tread-wounds of the coronet, caused by the calks of the 

 opposite shoe, by the shoes of other horses, or by forging, are 

 knoA\Ti as calk wounds, or simply as " calking." The injury 

 itself is either a bruise or a bruised wound, followed by inflam- 

 mation of the coronary cushion and an interruption in the 

 formation of horn at that point. It occurs most often in winter 



Fig. 190. 



Fig. 191. 



Shoe with cover-plate for street-nail treatment; suitable where pressure-dressing is de- 

 sired: a, hole in the bottom of the toe-calk for reception of spur, 6, of cover-plate; r, holes 

 for reception of screw-calks, rf, which fasten the cover-plate to the shoe. 



from sharp calks, especially on the hind feet. The common 

 seat of the injury is the coronet of the toe and inner side of 

 the foot. 



The inflammation terminates either in resolution — that is, 

 passes gradually away, leaving the tissues apparently normal — 

 or in suppuration. The perioplic horn-band, which is usually 

 loosened from the perioplic band by the injury, does not again 

 unite. For this reason, and because of the interruption in the 



