AND MALFORMATIONS OF 'THE FEET. 71 



three-quarter bar shoe, should be used, in order to 

 prevent pressure and concussion on the part of the 

 foot affected by the disease. In some cases it may 

 be desirable to apply a complete bar shoe. 



Wounds of the coronet resulting from treads 

 and such other accidents, and unconnected with 

 injuries of the sole, are not in their primary stage 

 true quittor. They only require to be treated as 

 ordinary sores, but, if neglected, they readily run 

 into quittor. (See infra. Treads, para. 84.) 



70. Sandcracks are fissures in the crust, and are Sandcracks. 

 usually found on the inside in the fore feet and in 

 front in the hind feet. They frequently have their 

 origin in brittleness of horn combined with con- 

 traction. Whilst, however, the disease is due to 

 these causes, the author would wish particularly 

 to impress on the reader, that these causes are 

 themselves greatly aggravated by the malpractices 

 of rasping the crust, cutting away the bars and 

 frog, and opening the heels. 



Sandcracks are also found in flat or sprawling 

 feet, and in these cases seem to arise from want of 

 tone in the secretions of the crust. 



A sandcrack does not usually cause lameness, 

 until it has become sufficiently deep to injure or 

 expose the sensitive laminae, or until it has ex- 

 tended to the coronary band. 



The usual treatment is to open out the crack 



