342 BUILDINGS, SANITATION, AND DISEASES 
to give in this disease. The dose is twenty or thirty grains 
in the feed, or as a drench, three times a day. Larger doses, 
and at more frequent intervals, may be given in acute cases 
for a short time. Quinine and bitter tonics can also be given. 
Blistering vintments and liniments should be applied to the 
inflamed articulations.” 
RICKETS. 
In this disease, which is commonly found among young 
pigs, there is enlargement, bending, and distortion of the bones 
of the joints and limbs, and fractures of leg bones are not 
uncommon. The bones do not contain their normal propor- 
tion of mineral matter, and hence lack strength. It is claimed 
that the disease is most common among closely in-bred hogs. 
The excessive feeding of corn throughout generations of swine 
is believed to be an exciting cause, or any conditions which 
interfere with proper nutrition, such as disease or unsanitary 
surroundings, may predispose towards the disease in question. 
Dr. Alexander of Wisconsin says: “ Pigs affected with 
rickets can seldom be profitably treated. Prevention is to be 
sought by avoiding the causes mentioned, maintaining sanitary 
conditions about the hogs, providing adequate supples of 
various feeds rich in all the requisites of a perfectly nourished 
animal, and obviating degeneracy by careful selection of robust 
sows and timely infusion of new blood.” 
Plenty of mineral matter should be provided at all times 
during the life of the pig. Methods and forms of supplying 
mineral matter have already been given in this book. 
PARALYSIS. 
In Virginia Bulletin 189, Dr. Mayo writes: “ The disease 
first appears as a slight loss of control of the hind legs, as 
