64 DISEASES OP SHEEP, 



regarded as entirely indisposed to the pox disease, and 

 therefore a third vaccination is unnecessary. After the pox 

 has ceased to exist, a thorough cleaning of the stables and 

 all fixtures which have been exposed to the vapors and 

 contact of infected or vaccinated sheep must be under- 

 taken. 



In conclusion, it may be remarked that goats which have 

 been in contact with sheep diseased of pox may also take 

 the same disease with like eifect. Vaccination may in such 

 cases also be resorted to, although under greater difficulties ; 

 and if such lymph is transferred back from vaccinated 

 goats to sheep, the benefit is the same. 



VERTIGO OR STAGGERS IN SHEEP. 



The' devastations caused by this disease are generally 

 known, the yearly average loss being calculated at from 

 five to six per cent., and there are certain instances on 

 record where the loss amounted to fifty, sixty and seventy 

 per cent, amongst the young breed in certain countries, es- 

 pecially in Germany. This disease being nearly always 

 found amongst all herds, it may be regarded as producing 

 the greatest comparative loss of all diseases. Young sheep 

 or lambs, especially those of the age of from five to eight 

 months, are most frequently attacked with vertigo. 



The following are the incidents of vertigo in its perfect 

 state: The diseased lamb is more or less deprived of its 

 senses and of the functions of the organs of motion ; the 

 animal is weak and its motions difficult ; it staggers and 

 reels, and prefers to lie down, and once down, it remains in 

 a state of stupefaction, there being very little or no appe- 

 tite. The gait or walking of the diseased animal always 



