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INFLAMMATION OF THE EXTERNAL EAR. 
or shaking the ears. Longitudinal wounds heal better than transverse 
ones. Injuries to the point, produced by shaking the head, are difficult 
to heal, because the animal is prone to irritate them afresh. After a 
time thickening results, and ulceration of the edges of the wound occurs, 
laying the cartilage bare and producing exfoliation. The surfaces are 
usually invested with a brown crust, and bleed easily. This condition, 
termed “ external canker,” is indicative of chronic mischief, and is 
usually a sequel of otitis externa. 
Treatment. Loose shreds, brought into apposition with sutures 
and treated antiseptically, will often adhere ; but where appearance is 
not legalded, they may be removed with the scissors. After cleansing 
and freshening the edges with scissors, the bare and projecting 
margins of the cartilage are pushed back as far as possible, and pin 
sutures inserted on both the external and internal surfaces. It is 
usually sufficient to pass the pins through the skin, but it may be 
desiiable to insert a few through the cartilage. After another thorough 
cleansing, the wound should be covered with gelatine and wadding, and 
m large animals a thin bandage passed round the ear. In dogs, the 
eais may be bound together on the sides of the head ; whilst in 
horses movement can be prevented by placing the animals on the pillar 
rems. If the dressing remains dry, it should be left in position for about 
a Meek. In ulceration of the cartilage, it is of first importance to 
pi event the head being shaken. This can be effected by bandaging the 
eais to the head, but preferably by the treatment recommended in 
inflammation of the external auditory meatus. Sections of skin which 
have lost their blood supply are removed. 
(2.) INFLAMMATION OF THE EXTERNAL EAR. 
Ibis condition is seldom seen in domestic animals other than the dog 
and pig. Pofeld saw a cow which lost a large portion of both ears from 
septic cellulitis. In dogs the condition usually results from excoriations 
of the external ear, due very frequently to otitis externa. Bites are 
a iare cause. On the other hand, cellulitis of the external ear is a 
common disease in herds of swine. Young pigs often bite each other’s 
ears, producing a disease which has been described as erysipelas, but is 
m reality an inflammation of the loose connective tissue of the outer ear 
and of its base. 
rhe animals usually hold the head inclined towards the affected 
side. Dogs often begin to shake the head, but are soon deterred by 
pam and give up the attempt. The external ear is greatly swollen, in 
pigs of a faery red, and shows numerous scratches and tears, from which 
serum discharges. Handling is very painful, and the parts feel intensely 
