E631 August 2026 USA Proofs: Four...
E631 August 2026 USA Proofs: Four Sires Are Driving the Entire Top 10 – Is Your Semen Tank Truly Diversified?

The Bullvine Daily Brief by The Bullvine

Episode notes

If three or more straws in your current tank trace back to Ripcord, Delux Dominance, or King Doc, you aren’t diversifying—you are buying the same genetics.

Every USA Holstein Top 10 in the August 2026 proof run traces back to basically four sire lines. The GTPI floor climbed 77 points in just four months, but this rapid genetic gain hides a dangerous concentration of risk. On The Bullvine Podcast, we map the sire stacks and maternal cow families—including the T-Spruce Jaela 47718-ET line behind seven top bulls—to show you exactly how to find true outcrosses in a market dominated by a handful of families.

What You’ll Learn

• Why the Ripcord, Delux Dominance, and King Doc lines dominate all major lists

• How to identify the real outcross sires versus those just changing the label

• Why full triplets from one flush a ... 

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Keywords
August 2026 USA proofsOcd Thorson RipcordGTPI sire rankingsNet Merit top siresdairy genetic inbreedingCDCB proof runHolstein sire stack