196 THE CHEMISTRY OF CATTLE FEEDING 



starch for growth, and the feeding standard becomes altogether 

 0-63 Ib. of digestible protein and 5 Ibs. of starch, i.e. for a 

 calf of 300 Ibs. live weight growing, not fattening, at an average 

 rate of 2 Ibs. per day. 



As the animals grow bigger, the allowance for maintenance 

 must be increased, and those which grow less or more rapidly 

 should receive a smaller or larger allowance on this account. 

 Calculated as above, the feeding standards for calves of 

 different size, but growing at the same average rate, would 

 be as follows : 



The calculated quantities given above correspond closely 

 with those recommended by various authorities as a result of 

 direct experiment; but for reasons given elsewhere (p. 136) 

 such feeding standards cannot be considered reliable. The 

 custom of reckoning the amounts of nutrients required per 

 1000 Ibs. live weight, instead of per head (as above), seems to be 

 particularly objectionable in the case of young, growing animals. 



In rearing young stock some farmers prefer to " do them 

 well," i.e. to partially fatten them while they are growing. 

 Others prefer to allow only for growth, and to postpone the 

 fattening process entirely to a later stage. The relative 

 economy of these two methods is discussed later on (p. 212). 

 The fact is referred to here only because it probably accounts, 

 to a large extent, for the apparent difference of opinion 

 regarding the rations required by growing animals. The 

 conclusions arrived at in this section are based upon the 

 composition of the bodies of the full-grown animals in the 

 store condition. The quantities given are, therefore, strictly 

 those required for growth only, as apart from fattening. 



