156 DAIRY FARMING 



from cows affected with contagious diseases should be 

 rigidly excluded from the dairy. Aside from the general 

 unfitness of such milk there is danger of the disease pro- 

 ducing organisms getting into the milk. It has been 

 found, for example, that cows whose udders are affected 

 with tuberculosis, yield milk containing these organisms. 

 The prevalence of this disease among cows at present 

 makes it imperative to determine definitely whether or 

 not cows are affected with the disease, by the application 

 of the tuberculin test. 



Any feverish condition of the cow tends to impart a 

 feverish odor to the milk, which should therefore not be 

 used. Especially important is it that milk from diseased 

 udders, no matter what the character of the disease, be 

 discarded. 



Sanitary Barn. Light, ventilation, and ease of clean- 

 ing are essential to a sanitary dairy barn. The disinfect- 

 ant action of an abundance of sunlight, secured by pro- 

 viding a large number of windows, is of the highest im- 

 portance. 



Of equal importance is a clean, pure atmosphere, secur- 

 ed by a continuous ventilating system. The fact that 

 odors of any description are absorbed by milk with great 

 avidity, sufficiently emphasises the great need of pure air. 



To permit of easy cleaning, the barn floors and gutters 

 should be built of concrete. They should be scrubbed 

 daily, and care should be taken to keep the walls and 

 ceiling free from dust and cobwebs. The feed boxes must 

 also be cleaned after each feed. 



The stalls should be of the simplest construction, to 

 afford as little chance for lodgement of dust as possible. 

 Furthermore, they should so fit the cows as to cause the 

 latter to stand with their hind feet on the edge of the gut- 



