Food Requirements of Pigs 363 



such as potatoes and tallow. The latter combination 

 was deficient both in protein and in bone -forming 

 compounds. Such marked differences are not usually 

 seen, because rations are not generally so extremely 

 one-sided. These experiments teach the lesson, though, 

 that as much care should be exercised in choosing the 

 pig's ration as the cow's. 



Experimental observations demonstrate that the 

 pig's ration should be selected with reference to sup- 

 plying an abundance of bone -making material and a 

 reasonably large proportion of protein. Evidence is 

 not wanting that the feeding of wood ashes and ground 

 bone to growing pigs promotes both a normal develop- 

 ment of the bony framework and a more liberal con- 

 sumption of food. Animals that are grazing may not 

 need to have the ration so supplemented, but it is 

 wise and even necessary with those confined in pens. 



In selecting foods for the production of small pork 

 where the development 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 condi- 

 tion 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. In order to secure the maximum 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 



