HOLSTEIN-FRIESIAN CATTLE. 



and most vigorous milkers. They commence using them at about fourteen 

 months old. They are rarely kept beyond three years of age. Many are turned 

 to the butcher at the close of their first year's service. They are invariably kept 

 in fine condition and as a rule are not allowed to run with their herds. So 

 far as discovered no unfavorable results have followed from the use of young 

 bulls. All classes of their cattle mature young. Probably the cattle of no 

 other breed show such rapid growth the first year. At two years of age their 

 heifers drop their first calves, and they are generally kept breeding as long as 



they live. Few of them milk less than ten months a year and many of them 

 exceed this period. 



The value of a breed of cattle may be judged somewhat by its aggressive- 

 ness, or in other words by the extent of territory over which it spreads in 

 competition with other breeds. Especially is this true of dairy breeds, found, 



