TREAD OR OVERREACH. 263 



In bad cracks there may, before the treatment has 

 commenced, be a protrusion of fungoid substance. This 

 causes acute pain and excessive lameness. As much 

 as possible of the sprouting flesh should be cut off; 

 the horn around pared thin, and a pledget of tow, 

 moistened with the solution of chloride of zinc, or 

 sprinkled with some powdered blue vitriol, bound as 

 tight as possible upon the part. There will be some 

 bleeding, but that should rather be encouraged than 

 checked. A little pressure with the caustic will re- 

 move any remaining portion of the fungoid substance 

 and also prevent its re-appearance. 



The sand-crack being removed, care should be taken 

 to prevent a return of it. A brittle foot requires 

 every care to correct the natural harshness of the 

 horn ; hence the necessity of careful stopping at night, 

 and the occasional application of the liniment to the 

 crust or wall of the hoof. 



TREAD OR OVERREACH. 



This is a wound on the coronet or heel, caused in 

 the fore foot by the hind one overreaching and wound- 

 ing it; in the hind foot it is produced by the heel of 

 the fore shoe being set down upon the coronet. The 

 part should be punctured in two or three places ; 

 warm fomentations should be applied; or linseed- 

 meal poultices. The contusion will often be so serious, 

 that some degree of sloughing will ensue. In such 

 cases poultices only debilitate the part, and promote 

 fungoid growths. The weaker solution of the chloride 

 of zinc, one grain to the ounce, will correct all fcetor, 



