DISEASES OF DOMESTIC ANIMALS. 151 



and when it comes to the stricture it will be resisted, and you may over- 

 come the stricture by the use of the probang Every day, or every other 

 day, a dose of aconite or such remedies may be useful. Sometimes rup- 

 ture is the result of choking, and is very serious. It generally comes 

 from the use of some such thing as a whip stock, to relieve choking, and 

 it might be done vrith the probang. There is both external and internal 

 swelling, great pain, pulse somewhat quick, offensive breath, in swallow- 

 ing, the substances sometimes pass into the areolar tissue, etc. It gener- 

 ally proves fatal. Some recommend cutting down and treating as 

 oesophagotomy, but death generally occurs in two or three days. 



DISEASES OF THE GLAISDS, ETC. 



The Salivary Olands. — There are three pairs of salivary glands — the 

 parotid, submaxillary, and sublingual. They secrete the saliva, which is 

 mixed with the food and fits it for digestion. 



Parotid Glands. — Inflammation of these is not uncommon in con- 

 nection with strangles. It is a hard, inflammatory swelling, extending 

 from the ear downward. In the horse it is apt to terminate in suppu- 

 ration, and sometimes induration. Slight induration is not very uncom- 

 mon, especially in those horses that are tightly reined, producing irrita- 

 tion and thickening of the gland. Use fomentations, poultices, and 

 stimulating liniments — ammoniacal or a weak solution of biniodide of 

 mercury — and you may bring about resolution ; but their is a great tend- 

 ency to suppuration. When matter is formed open it up, and if the ani- 

 mal is weak give iodine. Inflammation of these glands is often found in 

 cattle, in connection with tuberculosis, and the inflammatory action runs 

 on to suppuration, but not so quickly as in horses. A small amount of 

 matter may become imprisoned and remain there for a long time. It is 

 necessary to use a stronger embrocation on cattle than horses. Let the 

 matter out when formed. I have noticed in cattle that sometimes the 

 surrounding parts are vascular, and it is generally advisable to open care- 

 fully on account of hemorrhage. It is sometirnes best to explore it with 

 an exploring needle, and then enlarge the opening carefully. Induration 

 sometimes takes place, and the best remedy in this and all glandular en- 

 largements is iodine. Iodine one part, iodide of potassium one part, and 

 lard four parts, and give iodide of potassium internally. 



Steno's Duct.— The duct of this parotid gland winds around the 

 inferior maxillary bone and enters the mouth between the second 

 and third upper molar teeth. This gland secretes during mastica- 

 tion only ; the others secrete whenever food is taken in the mouth. 



Fistula of this Duct is not uncommon in horses. It sometimes 

 results from injury and sometimes from an abcess in irregular stran- 

 gles, or it may be due to the incautious opening of the abscess, 

 or some obstruction passing into the duct from the inside of the 

 mouth. 



Symptoms. — There is a discharge of thin watery fluid, which is in- 

 creased during mastication. When the horse is not masticating perhaps 

 the only thing noticed is a small opening on the outside of the jaw, and 

 a slight discharge, but if dry food is given there will be a greatly in- 

 creased discharge. The losing of this saliva interferes with digestion, 

 and colic may be the result. 



