454 FARM ANIMALS 
its work well. Nevertheless, the germs are developing, 
multiplying, gaining headway and so intrenching them- 
selves that illness and disorder are sure soon to follow. 
The period of incubation varies in different animals and 
in different diseases. It may take two or three weeks 
for development, or only two or three days. 
11. Period of eruption.—Following the period of incu- 
bation comes the period of eruption. At this stage the 
typical characteristics are ob- 
served. From now on the dis- 
ease approaches and reaches 
its height, the animal being 
—— i. under its complete dominion. 
nie: FEVER: AP TRS BRE If properly nursed and treated, 
in most diseases, the animal 
will pass through the period and recover its usual health. 
12. Patient improves.—The final stage of sickness is 
the period of improvement. In the battle between body 
and disease, the germs are destroyed and the body is 
victorious. All that now remains is to clear away the 
debris scattered throughout the system. The veterina- 
rian seeks the repair and recovery of the injured parts or 
organs as near to the original condition as the nature of 
the disease will admit. The period of improvement 
varies in different diseases and in different animals. 
Recovery may occur in a few days, and in other cases 
weeks and months are necessary for restoring health and 
vigor. A change of feed or pasture or work is usually 
desirable for most rapid recovery. In some cases, noth- 
ing but absolute rest will suffice. 
13. Getting well—After a disease runs its course, the 
body usually is restored to its normal condition. You 
see, there is a limit to what an ordinary, common disease 
can do; a healthy body may be attacked, but in the end, 
