I do understand and accept this to be of controversial subject matter. I have broad shoulders and a strong constitition to bare any negative responses.
I have seen here and locally pedigrees of several horses who go back into the very same gene pool extremely close-up in parentage both on the topsides and bothsides.
I feel the necessity to info those who are just getting into the "Wonderful World of Horses" the difference between line-breeding and in-breeding. They actually are one and the same. It's "line-breeding" if it produces a very good cross of close-up parentage. It is "in-breeding" if the close-up parentage is not a niche(nick).