306 PRODUCTIVE FARMING 



markets the price per pound is best if they do not exceed 225 

 or 250 pounds live weight, 



Protection from Disease and Parasites, Lice. Parasites 

 must be killed or prevented if swine are to be thrifty. Lice 

 are best controlled by liberal use of crude oil. Sacks wet 

 with crude oil may be tied around posts where swine will rub 

 on them. Sprinkle oil on shoats when they are feeding close 

 together. They will rub it on each other. It may be nec- 

 essary to catch the individuals and rub the oil on their under 

 parts. Do this thoroughly with an oily cloth. 



Worms. Pigs are subject to several kinds of intestinal 

 worms, kidney worms, and lung worms. They are seldom 

 serious if the quarters for feeding, wallowing and sleeping are 

 changed often or otherwise kept clean. Pigs are not natur- 

 ally filth-loving and their owner should aid in keeping them 

 clean. Ponds where they wallow should be changed from time 

 to time, or they may be covered with crude oil to hold para- 

 sites in check. Eggs from the droppings of hogs may be 

 swallowed by pigs eating in filthy places or sucking from 

 filthy udders. In every way try to keep troughs and feeding 

 floors free from all filth. Use common disinfectants freely 

 after cleaning. 



Several diseases are commonly found to attack swine. 

 Tuberculosis is spread to pigs from cows, chiefly through the 

 milk. Scours, indigestion, sore mouth, pneumonia, etc., are 

 not uncommon. Probably hog cholera is the most serious 

 disease of swine. 



Hog Cholera. Swine production is much hampered by 

 the disease known as cholera. This is very contagious. It 

 spreads from place to place in several ways, as by running 

 streams, by buzzards, crows, dogs and other animals, and on 

 the shoes of men. Care must be taken to prevent the disease 

 from spreading in any way. Swine may be vaccinated to 

 prevent cholera. This method is used by most owners. The 

 plan most commonly followed is to inject anti-cholera serum 



