138 SWINE 



essary carbohydrate from the corn and will get a little 

 protein, probably sufficient for maintenance. Then if he 

 has access to pasture, he will get more or less mineral 

 matter and protein from the soil, herbs and grasses of 

 the pasture. In case clover or alfalfa is available con- 

 siderable protein will be obtained. These will supple- 

 ment the carbonaceous concentrate sufficiently well so 

 that good results are possible. During the winter season, 

 when pasture is not available and the growing pig is re- 

 quired to develop on corn alone, he cannot progress sat- 

 isfactorily. 



Another series of data show that a given and 'definite 

 amount of water is very essential for the proper develop- 

 ment of the pig. During the summer season when the 

 weather is warm, and many times hot, the pig will drink 

 a considerable quantity of water. On hot days he will 

 even .drink too much. During the winter season, with the 

 other extreme of temperature, the pig will not drink 

 enough water for normal development. Furthermore, 

 when pigs have access to pasture they will take a consid- 

 erable amount of exercise which is conducive to good res- 

 piration; hence they take in an abundance of oxygen. 

 During the winter season when the weather is cold the 

 pig will take less exercise, so that this source of food sup- 

 ply will be greatly curtailed and the pig will suffer ac- 

 cordingly. Consequently, lack of a sufficient quantity of 

 protein, of water, and of oxygen is apparently the most 

 serious handicap to the winter feeding of pigs. If these 

 can be supplied pigs apparently can be fed with equal 

 success in winter as in summer except in very cold 

 climates. 



HOGGING DOWN CORN. 



This practice, consisting of letting the pigs eat the corn 

 from the stalks in the field, has become quite common 



