No. 4.] 



FEEDS AND FEEDING. 



11 



when it is eaten by the hen there will be no waste of any 

 one of these components. 



Food principles, or food compounds, include protein, car- 

 bohydrates and fats. 



Cecum 



~.>l--.,.A1oufk 



QJlet 



Slomach or 

 VrO'fcnlriculuS 



-Giz-^nrci 



"Panoreas 

 -Duodenum 



J^ntesfliie 



Digestive Organs of a Hen 



The nutritive ratio is the ratio between the amount of 

 digestible crude protein and the carbohydrates and fats in 

 any given feed. It is found by multiplying the amount of 

 digestible fats by 21/4, adding it to the digestible carbo- 

 hydrates and dividing the sum by the amount of digestible 

 protein. 



