THE FEEDING OF ANIMALS 175 



work. The proper quantity of food to be provided for an 

 animal will therefore vary considerably with conditions. 



As long ago as 18G4, Wolff proposed certain feeding 

 standards, which, with various modifications, have been largely 

 used in framing rations. In order to eliminate the influence 

 of the size of the animal, the proportions of "the various food 

 constituents to be supplied daily per 1000 lb. of body weight 

 are given. 



Wolff's Feeding Standards. 

 Per day per 1000 lb. live weight. 



In the case of the milch cow the ration ought to vary with 

 the milk-flow, or, better, with the amount of solids in the 



