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Breeders perfect high-altitude cattle for high-range ranchers

Dr. Tim Holt, the authority on PAP testing, performs tests on cattle with the help of Lisa Herrick and Curt Russell. Photo courtesy Susan Russell.

When Randy Rusk’s father returned from World War II, and began the family ranch, Rusk Ranches, near Westcliffe, Colo., the only cattle that could survive, let alone thrive, at the 9,000 feet and higher elevation were Herefords.

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