THRUSH. 193 



of sole-Jeatlier; the first piece fitting the sole accurately, the 



next not being quite so broad, and so on, so that the greater 



pressure will be on the center of the sole, which requires to 



be most raised. The necessary number of leathers being 



fitted, the outer shoe is to be put on by means of the screws! 



Enough leathers should be put on so that the two shoes will 



not come quite together at first. In a few days the screws 



may be tightened a little, and so on until the two shoes come 



together. Enough leathers should be put on at first to raise 



the sole to its natural position by the time the two shoes are 



brought together. The shoe should remain on until the wall 



of the hoof has grown about two-thirds of its length, which 



may be known by making a mark on the wall near the hair, 



and noticing its descent. The horse should be kept on a 



soft floor, or may be turned on grass. 



The efi'ect of this contrivance is, as every anatomist knows,, 

 that, as the hoof and the lamellse are produced at the coronary 

 ring, they are brought together, and, both growing out, will 

 be united and held together, until enough is thrown out to- 

 hold them in until they finish their union, after which time 

 the pressure may be removed by taking otf the shoe. 



THRUSH. 



A disease sometimes called fnisli. It is characterized by ai 

 discharge of matter from the cleft of the frog, of a peculiarly- 

 offensive smell. It is i\Q result of inflammation of the lower- 

 surface of the sensitive frog; its usual secretion of horn bein^ 

 changed, or partly changed, into pus or matter. It occurs^ 

 more frequently in the hind-foot than in the fore one. 



8^jmiitoms.—\Ti many cases the only means of ascertainino- 

 the existence of thrush is the peculiar smell, or, by a very 

 careful examination, the hoof showing no change in shape 

 and the frog not at all tender. The cleft of the frog will 

 generally be found lengthened and deepened, the fissure often 

 JLo 



