Close line-breeding has one HUGE thing going for it in the world of pedigree breeding; it enables you to find things out quickly. These things can either be good or bad and with Glen of Imaal Terriers PRA is the obvious. Berg was pre eye testing but there is certainly one thing that can be said about him with probably 99% certainty……he was not a PRA carrier. As he was so closely bred himself and then, in turn, was mated to his grandaughters so if he carried the “duff” gene it would have shown up.
Glen of Imaal Terriers are now lucky insofar that PRA can be tested for and work is on to find the marker but there are still conditions out there in all breeds that can only be discovered by close linebreeding. We DO NOT need it outlawed!!