AND HIS DISEASES. 13T 



stance, and in many instances i&an Tviequivocal symptom of 

 roaring. The grunting sound in a& cases should not be 

 taken as conclusive evidence of the ^.nimal being a roarer, 

 but a better test must be tried; he should be galloped 

 sharply for some distance, then pulled up quickly, and by 

 applying the ear to the nostrils or to the windpipe any, 

 abnormal sound will at once he noticed Professor Sewell 

 says, "The best test we can subject 'draught horses to, (sus- 

 p^eed roarers,) is to put them in harness and compel them to 

 draw heavy loads." 



Treatment. — Must be principally palliative, and much can 

 be done by generous and regular feeding, and never allowing 

 the animal to overload his stomach and bowels. Occasional 

 doses of laxative and sedative medicines tend to relieve the 

 more distressing symptoms. In very bad cases, where the " 

 animal is almost useless from roaring,- the operation of 

 tracheotomy, or the insertion of a tube in the windpipe, may , 

 be tried (see Operations, page 196) ; we have done it with sue- ' 

 cess, and the horse rendered useful for years. Roaring in. 

 all its forms is an unsoundness. 



BEONCHOCELE. 



Bronchocele, or morbid " enlargement of the thyroid gland 

 or body." These are two small glands situated one on each 

 side of the windpipe (trachea), about three inches from the. 

 head of the v^indpipe (larynx) ; they are ductiess glands,, 

 having no excretory duct, and they are largely supplied 

 with blood-vessels and nerves. 



Bronchocele is a very common affection amongst horses 

 in Canada, and is known as a- tumour situated on one or 

 both sides of the windpipe, and the character of the swell- 

 ing varies according to its duration. It may be soft' OB 

 firm, and it may affect the whole gland, or only one side off 



