POULTRY FEEDS AND FEEDING 



containing some animal protein feed, considerable bulk, 

 and supplying roughly about i part of protein to 4^2 or 

 5 parts of carbohydrates and fat, the fat being changed 

 to terms of carbohydrates, which is done by multiplying 

 the fat by 2j^. The proportion of digestible protein to 

 the total digestible carbohydrates is called the nutritive 

 ratio, as given in the Appendix. 



Sufficient experiments have not been conducted in 

 poultry feeding to determine the exact digestive value of 

 the various grains for poultry, as has been done with 

 cattle. Therefore either the total composition of the feed- 

 stuffs or the digestible composition may be used in figur- 

 ing this nutritive ratio. In figuring the nutritive ratios 

 in this book the fiber is included in the carbohydrates, but 

 very little fiber is digested by poultry. The composition 

 of the various poultry feeds is shown in Table (2) in the 

 rear of this book. The digestible composition of these 

 feeds as secured from experiments with animals is also 

 given in that .same table. 



VALUE OF ANIMAL PROTEIN FEEDS 



Meat scrap or some other animal feed high in protein 

 is the one essential constituent of the mash which cannot 

 well be omitted and is the part of the ration usually lack- 

 ing, both on the farm and with the small poultry keeper. 

 There is no other part of the ration which will give 

 greater returns than the meat part of the feed and no 

 other part which if omitted will reduce egg production 

 more than the meat feed. In experiments conducted at 



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