Why did cross breeding become taboo in the world of pedigree dogs?
Author, Ingemar Borelius discusses the history of the purebred dog - breed standards, breeding between varieties of breeds, effects of the reduction in heterozygosity/narrowing gene pools and current efforts and measures taken to sustain genetic diversity in breeds with the aim of addressing health and welfare issues. Specific breeds mentioned in this writing are the Retrievers and several others (Spaniels, Lundehund, German pinscher, Kromfohrländer...) .
Article-Ingemar Borelius -- Why did crossbreeding become tab