THE HEALTH OF THE HEED 103 



of the world. Among these are pleuro-pneumonia, 

 foot-and-mouth disease and rinderpest. The two 

 fprmer have at times attained a foothold on our 

 shores but by a vigorous system of quarantine and 

 the destruction of all infected and exposed animals 

 they have been absolutely stamped out, the result- 

 ing saving to American live-stock interests being 

 beyond all calculation. Some of these temporary 

 invasions have cost large sums, have involved the 

 enforced slaughter of some very valuable herds of 

 pure-bred cows, have entailed private financial 

 hardship -and have aroused most bitter animosity 

 against the authority charged with the enforce- 

 ment of the control measure; and yet the some- 

 what violent means adopted have been justified a 

 thousandfold. Several times within a generation 

 foot-and-mouth disease has thus been extinguished. 

 It is a testimony to what can be accomplished by 

 trained animal sanitarians armed with power, but 

 it is perhaps too much to hope that like results 

 can be attained with maladies like abortion and 

 tuberculosis where the symptoms are slow in de- 

 velopment and m^y lie long concealed. 



No man will go ver-y far in the business of dairy- 

 ing without suffering losses from disease. He may 

 not have many mature animals die, but calf scours, 

 abortion and garget will always be present and 

 sometimes will take their toll. Nor need he feel, 

 therefore, that he has been ignorant or careless in 

 his management. Undoubtedly more intensive 



