Reverse linebreeding does a progeny listing to find out which
descendants are linebred to this particular dog
For top producers this can be a huge list of dogs to work with
(well over 100.000). So there is a limit to this check, just to keep the
responce time within the acceptible
No dogs where found that are linebred to V2 TR V1 BG SG2 TR SG1 TR Frey von Tuni