This bloodline traces back the sires to what have been identified as the 3 foundation lines of the German Shepherd. Mutz von der Pelztierfame, Quanto von der Wienerau and Canto von der Wienerau.
The bloodlines may not be complete either because no information is available or the data has not yet been completed. 

Sire Bloodlines for
Brock vom Shepherdgate
 
Lenz vom Dolderbrunnen
Nero vom Schäferglück
Ben von der Goldenen Herde
Rambo zur starken Eiche
Hero zur starken Eiche
Atlas vom Wolfsjäger