DISEASES OF SHEEP AND GOATS 217 



provided with three pairs of legs. The female lays her 

 young in the form of a spun egg (cocoon) which is ob- 

 long in shape and brown in color. This egg is cemented 

 to the wool of sheep where young ticks are hatched in 

 about four to six weeks. 



Symptoms: Long wooled sheep are more susceptible 

 to this tick as their wool provides shelter for both the 

 tick and its eggs. After shearing the sheep the ticks have 

 a tendency to leave the body and to migrate to the legs 

 or to unshorn lambs where their snouts or trunks pierce 

 the skin which appears to become infected, producing a 

 swelling and inflammation. The infected sheep run, 

 scratch and bite themselves. When these ticks become 

 developed in large quantities, they produce a paleness 

 of the mucous membranes of the eyes, mouth and nose, 

 as the ticks suck large quantities of blood, which pro- 

 duces an anemic condition. The sheep become poor, weak 

 and unthrifty. 



Treatment: Satisfactorily treated by dipping in- 

 fected sheep in Coal Tar dips or Emulsions of Crude 

 Petroleum. Shearing the sheep has a good effect, but 

 care must be exercised as the ticks then rapidly migrate 

 to the lambs. 



