 Statistical analysis has shown that inbreeding to Northern Dancer is on average slightly "less" effective than when stallions of his line are bred to mares who do not have Northern Dancer in their pedigree (referred to as an outcross).However, many successful stallions are inbred, in part because this can make it easier to pass on dominant characteristics.Notable sires that are inbred to Northern Dancer (within four generations) include Oasis Dream, Rock of Gibraltar, Hernando, Spinning World, and Redoute's Choice.