200 POULTRY DISEASES 



gitis an attempt sliould l)e made to isolate the diseased bird 

 and earry out thorough disinfection. Calomel should be given 

 to the bird and cold water packs applied to the head. 



Cases of Vestibular Paralysis 



Figure 71 shows a picture of a Silver Campine hen which was 

 sent to the laboratory. This hen had the run of the farm with the 

 balance of the flock. She was about two years old. 



There was nothing in the history of the case to indicate whether 

 the hen had met with an accident or had a diseased condition of the 

 auditory nerve. The bird, as is shown in the cut, held her head un- 

 der the body with the top of the head resting on the floor. A 

 thorough examination of the external auditory canals did not re- 

 veal any signs of violence or parasitism. Eating was accomplished 

 with difficulty and the bird died after suffering in this manner for 

 a period of sixty days. 



A second case in which the bird showed similar symptoms and in 

 which examination of the auditory canals and skull was negative, 

 after a period of five weeks, gradually showed signs of improvement 

 and finally recovered. 



