Canada's top 10 Jersey sires averaged 99th-percentile LPI last year. Their Reproduction Index sat at the 47th — below breed average. Nobody's printing that.

Ten bulls sired 29% of every Jersey calf registered in Canada in 2025. On paper they look untouchable: 99th LPI, 97th Conformation, 100% A2A2. Murray Hunt pulled the subindex profile on the same ten bulls and found a 52-point gap between what the catalogs advertise and what those daughters will actually do in your barn. The Bullvine Podcast breaks down the math, the miss, and the fix.

What You'll Learn

Why 5 of Canada's 10 most-used Jersey sires sit below average for fertility
How a 34th-percentile Milkability Index quietly taxes every robot herd
What $3,010-per-head U.S. heifer prices mean for below-average RI genetics
Why 97th-percentile Conformation doesn't always pay — per Alcantara et al. 2022
How A2A2 adoption proves breeders move fast when the signal is clear
The one-page sire selection protocol to write before your fall semen order

Murray Hunt created the original Dollar Difference Formula and led Holstein Canada's Type Classification overhaul in the 1980s. After six decades in dairy cattle improvement, he's still pushing the industry to select on the numbers it buries — RI, HWI, and MI — not just the ones it promotes. This episode turns Jersey Canada's record registration year into a working playbook with 30-, 90-, and 365-day actions you can run against your own Lactanet login tonight.

Full article and sources https://www.thebullvine.com/genetic-evaluation-review/the-52-point-gap-hiding-in-every-jersey-sire-catalog-in-canada/ Subscribe for straight-talking dairy analysis. Share this with a producer who needs it.