COMMON POULTRY FOODS 243 



Unless they can be made to use large quantities of it, 

 enough of the animal nutrients will not be secured to supply 

 the need for animal food. In 100 pounds of skim milk or 

 buttermilk there are only about 10 pounds of solids or 

 food, and this should be considered in arriving at an 

 estimate of its value. 



Whey also may be used as a source of animal food, but 

 as may be seen in the table of composition of foods, it has a 

 lower value than skim milk and buttermilk. 



Milk Albumin. This is a by-product of the manufacture 

 of milk sugar. It contains little moisture and a high per- 

 centage of protein, but it is low in other nutrients. All 

 forms of milk foods lack in mineral matter, also in fat. 

 Where milk is used bones should be fed either dry or green 

 to furnish the required mineral matter. 



Beef Scrap is the most convenient form in which to 

 feed animal food. This is a by-product of the large packing 

 houses, and contains meat and bones in varying propor- 

 tions which have gone through a boiling and drying process. 

 It contains, therefore, little moisture compared with fresh 

 meat scraps." It varies considerably in composition, but 

 should contain from 50% to 60% protein. Beef scrap varies 

 also in quality. It should be light colored with a meaty 

 flavor and somewhat oily to the touch. "When boiling 

 water is poured over it, it should have a fresh, meaty flavor. 

 If it gives off a putrid odor, do not feed it. 



Fish Scrap is coming into use as a substitute for beef 

 scrap. Its practical value, however, compared with beef 

 scrap has not been experimentally determined, but the 

 practice of feeding it is growing, especially on the Pacific 

 Coast. The oil being largely removed in its manufacture, 

 there is no fishy taste transmitted to the eggs and chickens 

 by its use. If fresh fish, however, is liberally eaten there 

 will be a distinct flavor given to the egg. 



