174 MILK HYGIENE 



causing diarrhoea, concentrated feed causing indigestion, 

 poisoning by cotton-seed and nut-cake, etc.). 



It has been required in some cases that cows supply- 

 ing " nursery milk " shall be fed only upon dried fod- 

 der, and the use of oil meals has been restricted. By 

 this means, milk has been obtained which is good and 

 uniform, but it is so very expensive that its use is re- 

 stricted. Our present knowledge of the effect of food 

 upon milk does not sustain this requirement. But, it 

 should be observed, the stable and cows can be kept clean 

 much more easily if the cows are fed exclusively upon 

 dry foods than when they are fed in part upon turnips or 

 other green food. Therefore, if this one-sided method 

 of feeding is not demanded, great emphasis must be 

 placed on cleanliness with respect to herds supplying 

 nursery milk. It is not inappropriate, however, to make 

 some extra requirements in regard to feeding cows pro- 

 ducing nursery milk. For example, food stuffs, such as 

 distillers' slops, malt and molasses, as well as all fodder 

 which, fed in large quantities, may be injurious to cows, 

 should not be used (buckwheat, lupine, mustard, rape, 

 cakes mixed with mustard, cotton-seed meal, nut-cakes, 

 potatoes, etc.). Of course it is difficult to prove that a 

 ration containing a small quantity of these materials 

 would impart injurious properties to the milk ; but it is 

 safest, when it concerns milk for small children, to avoid 

 any possible danger connected with the use of such 

 foods; the more so, as this prohibition would have 

 no influence at all upon the cost of production of the 

 milk. Nor should one be allowed to give so great a 

 quantity of turnips or green fodder to cows that are 

 stabled that they suffer from diarrhoea, even to a slight 

 degree. 



[There has been much discussion and, in the past, 

 much difference of opinion, as to the propriety of using 



