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646. The phenomena of hearing are very interesting, and worth 

 reading up. The same may be said regarding the phenomena of 

 sight. Fortunately, we have very few diseases of the ear in horses ; 

 they may, however, get torn or wounded, and are prone to warty 

 growths, which must be removed by operation. Sometimes we have 

 a sinus running up the edge of the ear, the bottom of which, has been 

 found to contain a small rudimentary tooth. 



647. Canker of the ear, is mostly seen in dogs that have little to 

 do, and are over-fed. Heavy-eared dogs, as spaniels and retrievers, 

 seem to be predisposed to it. When affected, the dog holds its head 

 rather to one side, every now and again shaking it, and flapping the 

 ears, which it scratches with its feet. On examination, a nasty, fcetid 

 discharge is seen in the hollow of the ear. Treatment. — Washing 

 with warm water seems to aggravate and extend the disease. Wipe 

 the affected part as clean as possible, with medicated cotton wool, 

 then put a few drops of creasote, or oil of cloves into the ear, and rub 

 well in from the outside, but the best, and most radical treatment, is 

 to puff into the bottom of the ear a small quantity of iodoform, every 

 third day ; at the same time, giving a dose of castor oil and syrup of 

 buckthorn, and changing the diet. 



