ON SHOEING. 61 



DISEASED FROG, 



Commonly called a Running Thrush. 



This disease attacks the frog of the foot, 

 extending from its center up to the cleft of the 

 heels, and if neglected, terminates sometimes 

 in a canker. 



It is often improperly attributed to a bad 

 habit of body, and, on this account, it has been 

 supposed to be dangerous to attempt its removal. 

 A running thrush, however, is more frequently 

 produced by bad shoeing, than by any other 

 cause, as we daily find that horses of all habits of 

 body are subject to it. In cases where the dis- 

 charge from the frog has been of long standing, 

 it is possible that the system may experience 

 some temporary inconvenience hj the sudden 

 privation of an outlet to which it has been for 

 some time accustomed, but hence we are not to 

 suppose that an evacuation, which is not natu- 

 ral, should be essential to the health of an ani- 

 mal. 



