104 THE ECONOMICS OF FEEDING HORSES 



Now the standard ration for a horse of 1,000 lbs. at 

 severe work must provide the equivalent of 15 lbs. of 

 digestible starch, containing at least 2 lbs. of digestible 

 protein, with a nitrogenous ratio not wider than 1 : 6 (see 

 p. 52). For an animal of 1,200 lbs. the quantity must 

 be increased by 14 per cent, (see p. 48), thus becoming 

 practically 17 lbs. of digestible starch, the nitrogenous 

 ratio remaining the same. 



By calculation from Table IX. (p. 114) it is seen that — 



Thus Question (1) must be answered in the nega- 

 tive. The food is below the standard requirements 

 by 1*44 lbs. of digestible starch, but contains enough 

 protein. 



It is therefore necessary, if hard work is expected of 

 the horses, that the deficiency be made up. This can 

 be done either by increasing the daily allowance of the 

 present mixture, or by substituting other more economical 

 foodstuffs for some of the ingredients in it. Two factors 

 will determine which of these methods shall be adopted 

 — viz. : (1) The bulk or weight of food to be given daily ; 

 (2) the question of cost. 



