168 SHEEP DISEASES. 



name, "turnsick." Finally, it falls down and 

 dies in a convulsion. 



The fact that there is no sneezing or nasal 

 catarrh in gid differentiates it from grub in the 

 head. 



Treatment: This is unsuccessful, prevention 

 being the only logical method to pursue. Treat 

 the sheep dogs with a vermifuge, such as the 

 following : 



8 



Pulv. areca nut gr. xx 



Male fern 3i 



Turpentine m. x 



M. f. cap. 



Starve the dog all day, allowing plenty of 

 water. In the evening, give the above, and the 

 next morning administer four tablespoonfuls 

 castor oil. Do not allow the dog to run over the 

 sheep pasture. This is the average dose for a 

 forty pound dog. Stray dogs are best treated 

 with lead administered with a well aimed gun. 



Where sheep are known to be infected, all 

 heads of dead animals should be burned and not 

 fed to the dogs or left for coyotes. 



2. Grub in the Head. 



Grub; gleet; nasal catarrh. 



Cause: The sheep bot-fly, Estrus ovis, de- 

 posits living larvae in the nostrils of sheep. 

 These crawl up into the nasal cavities, causing 

 a violent catarrh, and, in severe invasions, death. 

 Loss of weight and lack of thrift always occur. 

 In some localities, they are a very serious menace. 



