314 PRINCIPLES OF BREEDING. 



the back of the animal, thus giving it extra weight, the task 

 will be accomplished without any trouble. This illustrates the 

 impossibility of producing a horse suited to all kinds of labor. 

 If proficient in one, he is lacking in the other. 



The general purpose cow, or the dual purpose cow, as she 

 is commonly called, belongs to the same class. There was a 

 time when all of our cattle were the same. The cow gave 

 milk enough to feed the young. Man, however, by selection 

 and feeding has developed two distinct types, one the high- 

 class beef animal and the other the high-class dairy animal. 

 It is not difficult to breed either one of these types, when 

 but the one quality is wanted. It is a most difficult matter 

 to breed an animal which combines these qualities in a fair 

 degree, to say nothing of getting an animal equal to the ideal 

 beef animal from a meat standpoint and possessing the milk- 

 ing propensities of the Jersey or Holstein. This is impossible. 

 It is possible, however, to breed an animal which will have a 

 fair beef form and at the same time possess medium milking 

 qualities. 



This is really the dual purpose cow and is much nearer to 

 the type of cow which formerly existed than either the dairy 

 or beef types, both of which are in a large measure artificial. 

 This same principle holds true in the breeding of all classes 

 of animals. When we start out to secure an unusual develop- 

 ment of one part of the body, the same can only be secured 

 at the sacrifice of some other part. This is the law of cor- 

 relation of parts, which simply means a regular and uniform 

 development of all parts and organs of the animal. 



