Dr. Doolittle takes a special place on the widely branched male side of the Oldenburg dressage legend Donnerhall and his pedigree is a sight for dressage experts. With the Thoroughbred stallion Lauries Crusador and the Trakehner stallion Argument, he has two refinement sires on his dam' side that both sired several highly successful Grand Prix horses, some of which even competed internationally.