MASSACHUSETTS ANIMAL INDUSTRY 



157 



Both feeds contain a considerable amount of fiber. The brewers' grains 

 are rich in protein and fat, the latter ingredient giving this feed its extra 

 energy value. 



Average Digestion Coefficients and Net Energy Values 



The average digestion cofficients for the two feeds do not differ very nnicii. 

 The horses were able to digest about one-half of the entire dry matter, as 

 against 62 and 66 per cent by bovines. The protein was well digested but 

 the animals were unable to make much use of the fiber. The utilization of 

 the fat in the present experiments seemed uncertain. 



The ten single trials with wheat bran gave rather wide variations in co- 

 efficients as well as in net energy values which indicated that the horses expe- 

 rienced difficulty in making use of it. We are, therefore, led to conclude that 

 as a source of nutrition, it is not to be recommended. It may be fed in limited 

 amounts (1-2 pounds daily) as a component of a ration because of its gentle 

 laxative effect. 



The four digestion trials with brewers' grains gave reasonably uniform 

 results. It was quite evident that the horses could digest the protein easily 

 but had difficulty with the fiber. The variations in net energy value are so 

 great that the average result is not stated. The reason for this is not apparent. 

 While in many cases, depending upon local conditions and cost, brewers' 

 dried grains may prove satisfactory as a component of the horse ration, it is 

 believed they can be used to better advantage as a food for dairy stock. 



The Utilization of Cottonseed Meal. 

 Two different lots were .fed, testing as follows: 



Chemical Composition 



