168 



PROFITABLE DAIRYING 



the danger from tuberculosis lies in its hidden 

 course of development, and for the sake of the 

 herd itself, as well as for human beings con- 

 suming the products of the herd, one cannot 

 afford to neglect taking such steps as are neces- 



Fig. 47. — A chicken liver badly affected with tuberculosis. 



sary to find out positively the condition of his 

 herd. If a stock owner is in the habit of buying 

 and selling cattle, especially dairy stock, it is 

 almost impossible to escape the disease. Even 

 in some of the best beef breeds the disease has 

 been widely prevalent. * * * If only tested 

 dairy stock could be transferred from one owner 

 to another, the rapid spread of the disease would 

 be checked, and it would not require much time 

 to eradicate the herds already involved." 



