226 FEEDING 



ture of cottonseed oil from cottonseed. It is not used ex- 

 tensively in poultry rations as it is apt to contain a great 

 deal of undesirable products. Soy bean meal ranks next 

 as a protein carrier, averaging 35 per cent of protein. It 

 is a grayish-yellow meal, made from the soy bean seed, 

 which must be finely ground when fed to poultry. It is 

 not used extensively owing to the limited supply. Linseed 

 oil meal is a common protein carrier, containing about 32 

 per cent of protein. It is a dark gray meal, exceedingly 

 fine in texture, the by-product resulting from the manufac- 

 ture of linseed oil from flax seed. One of the most common 

 sources of vegetable protein is gluten meal, which yields 

 30 per cent of protein. It is a yellow meal, lighter in color 

 than cottonseed meal, and is a by-product from the manu- 

 facture of starch from corn. It is probably more used than 

 any other material as a source of vegetable protein. Buck- 

 wheat middlings is another highly concentrated product, 

 not as yet much used in poultry feeding. It is a by-product 

 of the manufacture of buckwheat flour from buckwheat. 

 Analysis shows about 28 per cent of protein. 



Carbohydrates Fat 

 25 12 



30 15 



35 10 



45 11 



40 7 



CARBOHYDRATE FEEDS 



This group comprises a large number of valuable feeds, 

 all of the cereals belonging to this class. Carbohydrate 

 feeds can be, and are, largely raised at home. None of them 

 come from an animal source, not being found in animals. 

 The carbohydrates which are most commonly found in 

 poultry feed are starch and sugar. 



Corn and Its Products. Corn is the most widely used 

 poultry feed. It is raised extensively on most farms, and is 



