306 THE FEEDING OP ANIMALS 



animal and the adapting of food to its needs is to be 

 preferred to placing the herd, as a whole, upon any 

 inflexible ration. The capacity of an animal to receive, 

 its ability to produce, the effects of the sundry feeds upon 

 the health and condition of the animal, upon its appetite 

 and taste, upon the quality of the product, the money 

 values of feed, and the profits to be derived from their 

 use, are important considerations which do not enter 

 into the make-up of the physiological standard, but which 

 are vital factors in the feeder's problem. Clearly the 

 physiological standards may supplement, and in some 

 measure guide, judgment, but cannot take its place." 



