Hjalmer E. Oleen, purchased three granddaughters of Prince Domino in 1936 that were the foundation for his purebred herd. H.E.'s son, Carroll, continued raising purebred Herefords throughout his lifetime.
In 1977, two of Carroll and Marjorie Oleen's son's, Glenn and Chuck, formed the Oleen Cattle Co. that continues raising Herefords today.
Chuck's son, Brandon Oleen joined the operation in 2014.