CHAPTER VI. 



DISEASES OE THE EEGS AND FEET. 



A. Those caused by parasites. 



.MANGE OF THE LEGS AND FEET. 



Marge of the legs, or ehalk legs, is a coutagioiis dis 

 ease caused by a parasite known as Sarcoptes mutans. 

 It it confined exclusively to the legs and feel aud uevei- 

 extends to other parts of the body. 

 When the parasites of this disease 

 are placed on the legs o.f a healthy 

 fowl they work their way under the 

 large scales on the front of the leg or 

 on the upper part of the toes. They 

 multiply rapidly and within a short 

 lime it may be noticed that the scale 

 commences to rise and a little yellow- 

 ish crust forms about its edge. In 

 time, other scales become involve<l. 

 the crust increases in thickness and 

 scurfy, powdery material piles up in 

 considerable quantity until in 



The Parasite or 

 Mange ov the Lkor 

 old AND Feet. 



involved and to such an extent thai *"*• 

 they seem to be several times their uoinial thickness. 

 When this thick crust is' pulled off it is found that the 

 surface is raw and hlccdiiii;. The interior of the crust 



