238 VETEEINAKY MEDICINE AND SUEGEKY. 



shows signs of extending, such further portions as may be necessary must 

 be cut away, until the line of union between the crust and inner layer is 

 smooth and undivided. Fig. 128. A bar shoe, without a toe clip, should 

 be applied, with a view to relieve the anterior portion of the foot. Rub 

 an ointment of: 



Cantharides § ss. 



Lard » 3 vi. 



into the coronet every second or third day, and every day cover the newly 

 exposed surface with an ointment of: 



Lard, 



Turpentine aa^ viij. 



Beeswax § ij. 



Melt the lard and wax, and stir in the turpentine. 



This will protect it from moisture. Keep the foot dry. It may take two 

 or three months for the hoof to become perfect. During this time feed 

 the horse liberally. 



THRUSH. 



Synonym , — Frush. 



Definition. — Thrush is a disease of the frog, generally of the hind 

 feet, accompanied by a foul discharge through its horny covering. As 

 the disease advances, fissures occur in the side of the frog close to the heel, 

 from which a foetid matter exudes. 



Etiology. — It is commonly due to dirt of some kind; wet unclean 

 stalls, obliging the horse to stand in his own manure, are the most frequent 

 causes of this disease, which is, therefore, a disgrace to the horse owner. 

 It may also be caused by tlie filthy and wholly inexcusable practice of 

 stopping the feet with cow dung or other filthy substances. Sometimes, f 

 in feet which have been for some time affected with navicular disease, a 

 similar effect is produced on the frog; because the horse, on account of 

 the disease, the seat of which is immediately above the frog, saves as much 

 as possible that portion of his feet, and treads on his toes. It is, however, 

 asignular fact that this effect on the frog is not often found in the 



