CHAPTER V. 



DISEASES OF THE BRAIN AND EYE. 



1. COXGHSTION OF TUK IIKAIN. 



C-oiigeslion ol the brain may be caused by extieuie 

 exeitemem, by blows on the liead or sunstroke. It is 

 characterized by staggering, stupor, unusual move- 

 ments, such as walking backwards or walking in a cir 

 de, unusual and irregular movements witli the wings 

 and feet and twisting the head backwards or to the 

 side. Sometimes the bird will fall on its side and 

 make peculiar movonx-nts with its feet and wings, as 

 though attempting to rnn or fly. 



The treatment consists in keeping the animal per- 

 fectly quiet in a dark place, the admiuistnitiou of laxa 

 ti\es, such as two (easpoonftils of castor oil or one and 

 one-half grain doses of calomel, and the ajiplication of 

 cold cloths or ice to the head. 



