One of the best matings that can yield consistantly good results, is half brother half sister..seen some great dog, cage birds, pigeons from this mating.
But, I had a pure bred deerhound dog that jumped a 6Ft 6in batton fence to get to his sister in season, 3 of the pups were exported to the USA, 2 to Gary Hosker, one has become and American champion, and another from the same litter, owned by another person, needs only a few more points to do the same
Line breeding isnt just the putting together 2 related dogs...Not that easy Im afraid, loads of other things are required, including the be