384 THE FEEDING OF ANIMALS 



SO supplemented but it is wise and even necessary with 

 those confined in pens. < 



478. Dairy wastes as food for pigs. — ^In selecting 

 foods for the production of small pork where the develop- 

 ment of all forms of tissue is taking place, first rank must 

 be given to the dairy wastes. As a means of promoting 

 rapid growth and a condition of health and vigor, and also 

 as a supplement to cereal-grain products, skim-milk and 

 buttermilk are not excelled, and perhaps not equaled, by 

 any other feeding-stuffs. Dairy wastes are more profit- 

 ably used in pork production than perhaps in any other 

 way. (See Pars. 360-363.) In order to secure the maxi- 

 mum result from a given quantity of dairy wastes, they 

 should be fed in combination with grain products. When 

 this is done, and the proportions of skim-milk or butter- 

 milk and grain are what they should be, it appears to 

 require less digestible food substance for a pound of 

 growth than when grain is fed alone or when the liquid 

 food is largely eaten. In other words, dairy wastes are 

 not only efficient in themselves in producing growth, 

 but in proper combination they cause a saving of the 

 grain products necessary to secure a given ratio of gain. 

 Henry states, on the basis of eight feeding trials involv- 

 ing the use of ninety pigs, that 462 poimds of skimmed 

 milk effected a saving of 100 pounds of com meal. This 

 means that 46.2 poimds of digestible milk solids, when 

 combined with corn meal, saved, approximately, 76 pounds 

 of digestible corn meal substance. 



Henry's experiments were arranged so as to gain 

 information as to the most desirable proportion of milk 

 and meal, and from his data the writer has calculated the 

 quantity of digestible nutrients required in each com- 

 bination for one pound of growth: 



