FEEDING DAIRY CATTLE 211 
14. Testing with tuberculin.—There are two methods 
of controlling tuberculosis in cattle. One is the Ostertag 
or German method, which consists in removing from the 
herd only such animals as show physical signs of disease ; 
and the other is the so-called American method of remov- 
ing and slaughtering all animals which react to the tuber- 
culin test. The latter method is considered practical in 
herds which do not contain more than 15 per cent of re- 
actors. 
15. Order of supplying the food.—Certain foods, like 
cabbage, silage and turnips, will be less likely to taint 
Pure WATER AT ALL TIMES 
The dairy herd requires fresh water at all seasons of the year. This herd is never 
in want. 
milk if fed after milking. Grain may be given just be- 
fore or some time previous to milking. In the case of 
hay, there will be less trouble from dust if fed after 
milking. The following order is followed on many up- 
to-date dairy farms: Milking, first ; then the grain feeding ; 
then silage or roots; stable cleaning while the cows are 
watering; following this work come hay feeding and 
grooming. In winter, if the weather is pleasant, the 
cows may be turned out for exercise and morning air. 
