216 The Diseases of Animals 
be milked often enough to relieve the pressure and to 
prevent inflammation. When it is desired to “dry off” 
the dam, the udder should not be milked dry. 
The greatest objection to patent feeding devices in 
which milk is used as food for young animals is the 
difficulty in keeping them clean and sweet. In weaning 
calves it is generally preferable to teach them to drink 
“by hand.” 
PYEMIA, OR “JOINT ILL,” IN COLTS 
Pyemia is a disease of young colts due to infection 
by pus-producing bacteria. The disease usually occurs 
within two or three weeks after the colt is foaled. 
In the early stages of the disease the symptoms are 
the collecting of pus in the pockets or swellings, aud 
usually some swelling of the joints in the affected 
region, with stiffness and difficult locomotion. If the 
pockets are not opened, the pus often burrows along 
the tendons and in the loose tissue about the joints, 
until it finally breaks and discharges as a thin yellow 
fluid from pockets that spread and ramify in various 
directions. The source of infection is usually a wound 
of some kind, in most cases probably the navel. When 
this disease is neglected the colt becomes dull, loses 
appetite, lies in the sun, grows weak, and finally dies. 
All cavities containing pus should be opened freely, 
washed out with warm water, and treated with a solu- 
tion of corrosive sublimate (one part to one thousand 
parts of water). A solution of one part of peroxid 
of hydrogen in two parts of water is excellent. <A 
