At 18, Dubeau Dundee Hezbollah’s legacy lives on through 200+ progeny worldwide. How one phenomenal cow rewrote Holstein Breeding history

The dairy world bids farewell to one of its most influential foundation females, Dubeau Dundee Hezbollah EX-92 EEEEE (“Hez”), who passed away on March 4, 2025, at the remarkable age of 18 years and 3 months. Her genetic legacy has reshaped Holstein’s breeding worldwide, leaving an indelible mark on the industry.

A Life That Defined Excellence: From Show Ring Glory to Brood Cow Greatness

Born December 1, 2006, Hez’s journey began in the bright lights of the show ring. She first captivated breeders and judges by claiming Intermediate Champion honors at the World Dairy Expo as a two-year-old in 2009. This early recognition set the stage for her future influence, as her stunning conformation and dairy strength earned her All-American and All-Canadian Senior Two-Year-Old titles that same year, solidifying her status as one of the breed’s rising stars.

Her competitive fire continued to burn brightly as she matured. In 2011, she claimed Reserve All-American Four-Year-Old honors and Grand Champion at the Midwest Spring National Show. However, her promising show career was tragically cut short by a significant udder injury sustained later that year after earning Honorable Mention Senior Champion at Madison. While this setback ended her time in the ring, it redirected her toward a far greater destiny as one of Holstein’s most influential brood cows.

The Numbers Behind Her Legacy: Rewriting Genetic Records

Hez’s influence on Holstein’s breeding is truly global, as evidenced by the staggering statistics she leaves behind. Over her lifetime, she has produced more than 600 embryos and registered over 200 progeny globally, from Australia to Canada. Her offspring have made their mark in Japan, Europe, Mexico, and the United States, demonstrating her unparalleled influence across continents. This global reach is a testament to the power of strategic breeding and the potential for one exceptional cow to shape the industry worldwide.

Her transmission rates are nothing short of extraordinary. By 2018, of her classified daughters in North America, an astonishing 89% scored Very Good or Excellent, with nearly 30% achieving Excellent status. These numbers far exceed industry benchmarks for elite brood cows, where only 10-15% of offspring typically reach the Excellent classification. Hez’s ability to consistently pass on superior genetics challenges conventional assumptions about transmission reliability and raises the bar for what is possible in Holstein breeding.

Shattering Stereotypes: Dual Excellence in Type and Production

While Hez’s conformation excellence captured immediate attention, she was more than just a show cow. Her production records proved that elite type and high milk yield can coexist. Her four-year-old lactation is proof: 4-03 2x 365d 42,050 lbs milk with 4.4% fat (1859 lbs) and 3.1% protein (1299 lbs). These numbers rival production-focused cows while maintaining exceptional udder quality and dairy strength.

This dual excellence challenges outdated notions that show cows sacrifice production for type. Hez demonstrated that truly elite individuals can excel in both arenas simultaneously—a lesson that continues to influence progressive breeding programs worldwide.

Strategic Breeding Decisions: Unlocking Genetic Potential

Hez’s success wasn’t accidental; it was the result of strategic breeding decisions that maximized her genetic potential. Certain sire combinations, such as Goldwyn crosses and Atwood matings, proved particularly magical with Hez. These pairings consistently produced elite offspring, including daughters who scored EX-94 and EX-92[3]. This strategic approach to breeding, combined with Hez’s inherent genetic quality, was a key factor in her success.

Her son, HEZTRYRC (by DestryRC), became an influential sire in his own right, with several All-American nominated daughters enhancing his reputation. Her global impact extended further with a Destry*RC daughter claiming Grand Champion honors at the Mexican National Show 2016[3]. These results highlight the importance of thoughtful sire selection in maximizing genetic outcomes—a lesson for breeders looking to replicate Hez’s success.

Multi-Generational Impact: Prepotency Redefined

What makes Hez’s legacy particularly fascinating is how her influence extends into subsequent generations. Her granddaughters have emerged with remarkable type scores—several testing nearly +4 points on type—demonstrating her ability to stamp her traits consistently through multiple generations. This generational transmission represents what geneticists call prepotency: the rare ability of an individual to pass on desirable characteristics predictably.

In an era dominated by genomic evaluations, Hez’s story reminds us that prepotency is critical to breeding success. Her descendants’ achievements suggest that linebreeding on truly exceptional individuals can yield consistent results that random matings cannot match.

Defying Age: Lessons from Hez’s Longevity

Hez continued to defy expectations even into her later years. At nearly 17 years old in 2016, she thrived at Interstate Calf Care in Maryland while undergoing regular IVF programs. Her remarkable longevity raises essential questions about modern herd management practices. With average productive lifespans declining across dairy operations globally, could breeding for structural correctness and overall robustness—as exemplified by Hez—help reverse this trend? This is a crucial question that underscores the urgency and relevance of the work of dairy farmers and breeders.

Her extraordinary, productive life offers valuable insights into the economic and ethical advantages of prioritizing durability alongside production and type. This strategy could benefit dairy farmers facing increasing pressure to optimize herd performance.

Economic Ripple Effect: The True Value of a Foundation Female

The economic impact of Hez’s contributions is incalculable but undeniably immense. Beyond the direct value of her embryos and offspring sold worldwide, consider the multiplier effect of her genetics through generations of descendants improving herds globally. This economic ripple effect underscores the long-term value of investing in genuinely exceptional foundation females-a strategy that pays dividends far beyond initial costs and highlights the significant economic impact of the work of dairy farmers and breeders.

Her son, HEZTRY*RC, entered the AI service, exponentially extending her influence through thousands of daughters worldwide. Her exceptional daughters became foundation females, commanding premium prices at elite sales. The ripple effect from these animals continues expanding with each generation—creating lasting value for dairy farmers who may never have heard Hez’s name but benefit from her genetic contributions.

This economic multiplier underscores the long-term value of investing in genuinely exceptional foundation females—a strategy that pays dividends far beyond initial costs.

Saying Goodbye to a Legend: One Cow Changed Everything

Dubeau Dundee Hezbollah’s passing marks the end of an era in Holstein breeding but leaves behind a legacy that will endure for decades. As breeders worldwide reflect on her contributions, Hez is a powerful reminder that true excellence transcends time.

Her descendants will continue shaping show rings, milking parlors, and breeding programs across continents—proving once again that sometimes, one cow can change your life.

Key Takeaways

• Extraordinary Transmission Rates: Hez’s ability to consistently produce elite offspring (30% reaching Excellent classification) far exceeded industry norms, redefining what’s possible in genetic reliability.
• Dual-Purpose Excellence: Hez shattered the false dichotomy between show type and production ability, proving elite cows can excel in both arenas simultaneously—a blueprint for modern breeding programs.
• Strategic Mating Decisions Matter: Specific sire combinations (particularly Goldwyn and Atwood) consistently yielded exceptional results with Hez, highlighting the critical importance of thoughtful mating selection over simply chasing top genomic numbers.
• Economic Multiplier Effect: Hez’s influence extends beyond her direct offspring through her son HEZTRY*RC in AI and numerous daughters becoming foundation females, creating lasting economic value across global dairy genetics.
• Longevity Advantages: At 18+ years, Hez’s remarkable productive life challenges current industry practices and highlights the potential benefits of breeding for structural correctness, robustness, and durability in modern dairy operations.

Executive Summary

Dubeau Dundee Hezbollah “Hez,” who passed away on March 4, 2025, at 18, transformed Holstein breeding through her exceptional genetic influence spanning multiple continents. Beginning as a World Dairy Expo Intermediate Champion before becoming a legendary brood cow, Hez produced over 600 embryos and 200+ registered progeny worldwide, with an unprecedented 89% of her daughters scoring Very Good or Excellent. Her dual excellence in show ring type and production (over 42,000 lbs of milk with high components) challenged industry stereotypes. At the same time, her extraordinary longevity and prepotent genetics influence dairy herds globally through strategic breeding decisions that maximize her genetic potential. Hez’s legacy demonstrates how one exceptional individual can create an economic ripple effect that reshapes an entire breed for generations.

Learn more

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