Why write a three-part series about the bull Pine-Tree AltaOak? Because Oak, with his outcross pedigree, was still able to reach the highest realms of the index lists, and thus received opportunities at numerous AI companies... and was convincingly able to cash in on these opportunities. In part one, Oak’s influence was extensively featured, including via his grandson Renegade. As such, Oak is a splendid example of an outcross bull who is able to weave “less common” blood into elite breeding. This series reveals the genes behind Oak. Last month, we looked at his maternal grandsire, the German bull Leif; now we consider the equally special sire of Leif: Lukas.