134 Dynamic Evolution 



Dogs imported for breeding purposes, and 

 their immediate progeny, are naturally kept 

 busy in the breeding kennels, and only a few 

 of the progeny are trained and sent to run 

 in field competitions for the purpose of keep- 

 ing the public informed of the qualities of 

 this kind of dog. Training and running dogs 

 consume time and money, and also interfere 

 with their breeding activities. Dogs are bred 

 at from one to eight or ten years of age, with 

 an average of about three or four, but the 

 lines of descent from the original imported 

 stock to the six champion dogs is not through 

 animals produced by such young parents, 

 nor through those which were kept exclu- 

 sively in the kennels for breeding purposes. 

 They are through the dogs which were 

 trained and ran for prizes in field trials, and 

 the average time between generations is over 

 six years, being substantially the same as 

 that which led Burgess to consider the 

 Laverack pedigrees as fraudulent. One line 

 has three generations in twenty-four years, 

 an average of eight years per generation; 



