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Originally Posted by airplane  ...Anyways, she told me that the sweet spot was to have the sire’s father and the dam’s grandfather to be the same dog. .... |
Search “dog inbreeding”. According to an article I recently read what you described is line-breeding... another way to say inbreeding. I was pretty peeved when I discovered the stud I just used had “line-breeding” in his line. The article explained the pros and cons of the practice.
(Sorry I don’t have a link for the article - it’s been a while since I read it.)