DISEASES 151 
legs and multiplies there. It is a disease 
which apparently has no serious ill effect 
upon the hen, but which hurts her appearance. 
In most cases, scaly legs do not appear if the 
henhouse, and especially the dropping boards, 
have been thoroughly clean. If the trouble 
does develop, the best thing to do is to dip 
the legs of infested hens into a can con- 
taining common kerosene. Two or three 
applications of this treatment should kill the 
mites. The mites will disappear and the 
scales will return to a normal condition. 
Roup. Roup is not as common or preva- 
lent in the present-day poultry house as it 
was in the old, closed henhouse. It is a 
disease which may be considered as an after- 
effect of a cold. The eyes run, there is a 
discharge from the nostrils which is sticky, 
the eyes may later fill up with a puslike dis- 
charge and may become entirely closed; 
there is very likely to be canker or yellowish- 
white growths inside the mouth. 
The best method of treatment is preven- 
tion, by having a sufficient quantity of fresh 
air coming into the henhouse through the 
open fronts. But if, in spite of this, the 
