82 Bulletin 152. 



anioiiiits of food required by different animals of the same age, 

 is the same in regard to the production of fat as in the produc- 

 tion of milk, namel}^ the largest variation is found among two 

 year olds, next come full aged cows, then three-year olds, and 

 the least variation is among four-year olds. As regards the va- 

 riation in actual pounds of dry matter, the order is, two and three- 

 year olds, full aged cows and last, four-year olds. 



Three cows are named in both E and F. Number 133, Clo- 

 thilde Artis Belle has the distinction of requiring less food for 

 100 pounds of milk and also for one pound of fat than any other 

 four-year old. Number 159, Netherland Wayne, required more 

 food for the same amount of milk and fat than any other aged 

 cow. Number 187, Helena Burke, required less food for the 

 same amount of milk and fat than any other aged cow. 



Under G are given the average production and consumption 

 of all the animals that were tested on stall feed. In the order 

 of production of milk and fat they stand in the order of age, the 

 two-year olds averaging the least and the full aged cows the 

 most. In average consumption of food, however, the three-year 

 olds are the highest, being a trifle more than full aged cows, after 

 which follow four and two-year olds respectively. In amount 

 of dry matter for 100 pounds of milk and one pound of fat, full 

 aged cows require the least and are followed successively by four, 

 three and two-year olds. From these averages it would seem 

 that full aged cows lead in economic production although they 

 are so closely followed by four-j^ear olds as to make the difference 

 of little or no account. 



" ECONOMIC FOOD TESTS." 



Under H are arranged the records of five cow^s that were 

 entered in the " Economic Food Tests." The Holstein-Friesian 

 Association gives prizes to the cows producing butter at the least 

 cost per pound for food. A list of all the more common cattle 

 foods with a schedule of prices is given, and each breeder is at 

 liberty to choose any of these with which he thinks he can pro- 

 duce butter the cheapest through his particular animal. These 

 prizes have been offered for only two years and in this state six 

 cows have been entered for them. One cow, No. 146, was en- 



