SWINE KEARIXG WITH DAIKVING 439 



yz, 70 and 51 pounds, a total of 275 pounds, and a gain 

 over tlie pigs on sweet milk of 35 pounds. It follows, 

 then, that at the time of killing, the two sets of pigs had 

 made substantially the same gain. A queer fact de- 

 veloped when the pigs were killed, and one for which 

 no satisfactory explanation has been given. Each pig 

 tiiat had been fed sweet milk shrank more in dressmg 

 than its mate on sour milk. The percentages of shrink- 

 age for the sweet milk pigs were 21, 16, 18 and 19, an 

 average of 18 per cent. The sour milk pigs shrank 16, 

 14, 17 and II per cent, an average of 14, or 4 per cent 

 less than the pigs on sweet milk. This 4 per cent, or 

 about eight pounds per pig, represents the total gain 

 of tiie sour skim milk over the sweet skim milk. The 

 difference in the results obtained from feeding sweet 

 skim milk and sour is so little that not much can be 

 claimed in favor of sour milk. Nor do we desire to 

 claim any advantage from its use. The object of the 

 experiment has been attained when it is shown, as these 

 two years' work do show most conclusively, that sour 

 skim milk is at least equal in feeding value to sweet skim 

 milk." 



BUTTERMELK 



Skim milk and buttermilk are considered of equal 

 \alue for swine. This was proved in tests by the Massa- 

 chusetts experiment station (Bulletins Nos. 13 and 18), 

 as has been the case wherever tried elsewhere. The com- 

 ])arison. however, refers to pure buttermilk, and not the 

 diluted or oversalted product which sometimes comes 

 from the creamery. Buttermilk mixed with washings or 



