254 THE STOCK owner's adviser. 



when involved in the abcess of strangles. When it is opened the 

 saliva will flow from the wonnd instead of flowing into the mouth. 

 The flow of saliva is greatest during mastication. 



Treatment. — The first step in the treatment of open parotid 

 duct is to make an opening between the wound and mouth, along 

 the course of the original canal, if possible; if not, an artificial 

 canal must be formed, bj introducing a seton from the ulcer in 

 the mouth, which should remain for four or five days, or until it 

 has made a suppurating channel. It is then to be withdrawn, 

 the external wound is lu'ought together by suture and colodion, 

 or styptic:Colloid, tliickly applied. The dressing should in no 

 way be disturbed, and the animal should be fed on milk, eggs, 

 and such like, in order to prevent the stimulation of the glands. 



This method of treatment can only be carried out by your 

 veterinary surgeon. If you decide, however, that you have an 

 opening of the duct, you may try, bringing the edges of the open- 

 ing together with suture, paint them with several layers of collo- 

 dion, and await results. In the mean time, give very little food 

 for several days. In some cases all treatment fails. The gland 

 should then be destroyed by injecting into its substance the fol- 

 lowing: Nitrate of silver, one drachm; nitric acid, one drachm; 

 water, one ounce. 



SALIVARY CALCULI. 



Calcareous deposits may form in any actively secreting gland, 

 or in the duct in connection with the gland. It is thought that a 

 piece of hay or corn gains entrance to the canal, and the salts of 

 the saliva adhering to it form concretion. The concretions block 

 up the duct, which becomes enlarged and distended with saliva. 

 The foreign body must be removed through the mouth. A pen- 

 dulous sack will be noticed on the borders of the jaw. 



Excessive secretion of saliva — ptyalism — results from disease 

 of the teeth, some peculiar food as green food, mercuralism; any 

 source of irritation in the mouth from the poison of epizootic 

 aptha, or foreign body in the tongue. 



