216 THE VETERINAEIAN 



patches eventually pile up until they attain the thickness 

 of one-half inch, unless these scabs have been severely 

 rubbed. 



Symptoms : Very easily detected, as a bunch of sheep 

 that have been recently infected will be uneasy or rest- 

 less, rubbing against fences, posts, brush, etc., causing 

 bunches of wool to loosen. The itching seems to be more 

 intense at night and during warm weather. The affected 

 animals will even make attempts to bite themselves, due 

 to the agony produced by the mange mite. If the skin is 

 examined by the aid of a magnifying glass, the mange 

 mite can be easily noticed, or by scraping the skin with 

 a knife and placing the scabs on a dark paper and ex- 

 posed to the warmth of the sun, the mange mite moving 

 about can readily be seen with the naked eye. Mangy 

 sheep become very poor and eventually die. 



Pkevention : This is important, for although the dis- 

 ease is treated with very good results, the mange mite 

 annoy the sheep until they become very weak and ema- 

 ciated and the loss of wool is enormous due to the affected 

 animal continually rubbing against fences, brush, etc. 



Teeatment : Consists of using various dips, as Lime 

 y<and Sulphur, which is recommended by the United States 

 ^ Bureau of Animal Industry. This is very effective and 

 inexpensive. Scabby sheep should be dipped a week or 

 ten days after shearing; two dippings are necessary at 

 the interval of ten days. After dipping, move to non^ 

 infected range or pastures. 



TICK 



(Louse Fly) 



Cause : The tick that infects sheep has a very small 

 head sunken into its round body. The head possesses a 

 flexible trunk or snout that penetrates the skin. Through 

 this trunk, the ticks derive their nourishment by sucking 

 the blood from the body of the sheep. The tick is also 



