Canadian Holstein heifers just crossed 9.99% inbreeding — the highest of any major breed — and it's quietly dragging money off every cow while your index looks the other way.

The Bullvine Podcast breaks down the inbreeding tax: roughly $44 per cow for every 1% over baseline in lifetime drag, plus $60 to $100 per cow, per lactation in the herds carrying the most. Net Merit and TPI don't penalize it — that math lives entirely in your matings. We cover why it's happening, and the one linear rule that separates real dairy strength from expensive frailty.

What You'll Learn

• Why 99.84% of active Holstein AI bulls trace back to just two 1960s grandfathers
• How a 5-point inbreeding jump costs a cow 92 kg milk and 65 days of productive life
• The 1:1 Frame Rule — if Stature STA beats Strength STA, you're buying height, n ...