DAIRY HERD MANAGEMENT 657 



some bulls are naturally cross. In any case, great care must be take 

 with them. They should never be trusted. They should always have 

 a ring in their noses and be led by a stock from the ring. Bulls seem to 

 know when a man is afraid and are more apt to attack such a one than one 

 who is more courageous. A bull that becomes vicious is often subdued 

 by being thrown with a rope. He then learns that he is under the control 

 of man. The amount of service that a bull may have depends upon his 

 age and condition. During the second year, a good, thrifty bull can be 

 used once a week. A mature bull may serve one hundred to two hundred 

 cows a year if the periods are distributed well throughout the year. In 

 general, however, because of the variation in the intervals in which cows 

 come in heat, a bull should be provided for each forty to fifty cows. 



REFERENCES 



"Dairy Cattle and Milk Production." Eckles. 



Iowa Expt. Station Circular 16. "Care, Feed and Management of the Dairy Herd." 



Minnesota Expt. Station Bulletin 130. "Feeding Dairy Cows." 



