isle} EXAMINATION OF HORSES 
LECTURE XII. 
Sandcrack—Thrush—Thrush as a Constitutional Disease compared 
to Fistula in Ano—Thrush always a Bad Form of Unsoundness—’* 
Elbow : Tumour on Elbow—The Back Tendons examined—: 
‘* Wind-gall ”’—‘‘ Thoropin ”—Filled Legs. 
GENTLEMEN,—We now come to the consideration of the 
last three diseases of the foot that we have named, which 
need not occupy much of our time, inasmuch as there 
are no disputed points about any of them. 
Sandcrack is a split or crack.in the hoof, running from 
above downwards, occurring in the direction of greatest 
pressure; and therefore we find it on the inside of the 
fore foot, and on the front of the hind foot. As a rule, 
we find it on the inside of the fore foot ; but where, 
from toes very much either in-turned or out-turned, we 
have the line of weight abnormally directed, we may at 
times find it elsewhere. If the crack is wide and deep, 
it is of course easily recognized ; and it has only to be 
deep—that is, to involve the deep, sensitive structures— 
to give rise to lameness, by which alone it may be 
discovered. When the crack is limited, so that no 
lameness results, it is an easy matter to overlook it. 
