The use of medicated feeds for special purposes continues to increase in 

 volume. Special directions for feeding are printed on the tags attached to such 

 feeds. The use of drugs in feeds for the control of certain diseases must be 

 carefully investigated and meet the approval of the Food and Drug Adminis- 

 tration before it is put on the market. 



It is not within the scope of this bulletin to make recommendations regarding 

 the use of commercial feedingstuffs. The Department of Dairy Husbandry and 

 the Department of Poultry Husbandry are continuously studying feeding pro- 

 blems. The following publications of these departments are free to residents 

 of New Hampshire, Address your request to Mail Service, University of New 

 Hampshire, Durham, New Hampshire. 



Ext. Bull. 67 



Ext. Cir. 274 



Ext. Cir. 282 



Sta. Bull. 401 



Ext. Bull. 114 



Turkey Production in New Hampshire, 16 pp. 



Brooding and Bearing Chickens, 20 pp. 



Dairy Calves. 



Feed Standards for N.H. Broilers. 



Feeding Dairy Cattle. 



While the word feedingstuff does not appear in all the above titles, no 

 publication is included which does not discuss some aspect of the use of 

 feedingstuffs. 



Inquiries occasionally are made regarding a method of calculating the 

 protein, fat or fiber content of a home mixed feed. There are tables available, 

 such as those in Morrison's book "Feeds and Feeding", which give the average 

 chemical analysis of feed concentrates, roughage, and silages. It should be 

 pointed out that the chemical analysis of a particular lot of an ingredient may be 

 somewhat above or below the average figure shown in the table. This fact must 

 be taken into consideration in fixing guarantees. The following example shows 

 how the protein content of a feed mixture may be calculated. 



Total Mix 



Pounds used 



Per cent 

 Protein in 

 Ingredient 



lbs. protein 



furnished by 



Ingredient 



contains 



1410 lbs. 225 lbs. protein 



The mixture contains 



225 

 1410 



x 100 = 15.95% protein. 



The percentages of fat or fiber may be calculated in a like manner by 

 substituting the fat or fiber figures for those of the protein. 



