DISEASES AND INJURIES -OF THE EAR 89 



Some cases of canker are, unquestionably, of 

 constitutional origin, but by far the largest pro- 

 portion of cases in the cat are due to a species of 

 minute parasites, and the acari can clearly be seen 

 if the sooty-like deposit be examined. 



Their presence sets up a great deal of local 

 irritation, but seldom leads to suppuration, so 

 frequent in cases of a constitutional nature. 



It is absurd to say that internal canker of the 

 ear arises from a cold, etc. One or both ears may 

 be affected. 



Symptoms. 



The affected animal will be seen seeking relief 

 by rubbing its ear, and, not infrequently, has fits 

 of vertigo, running round the room as though it 

 were in a frenzy. 



If the ear is examined it will be found reddened 

 inside and moist, with either a sooty-like deposit 

 or else a discharge. Manipulation causes pain, 

 and the animal is constantly turning its head to 

 one side. 



Treatment. 



Grip the cat firmly, in accordance with instruc- 

 tions given elsewhere (see " Management "). 



Syringe out the ear with a little methylated spirit, 

 or else clean it out with a little boracic acid lint 

 and methylated spirit. 



In fact, this must be done daily. In addition to 



