Declining replacement heifers raise concern for milk supply
The US dairy industry is facing a significant challenge as the number of replacement heifers has fallen to its lowest point in 20 years. A new report from CoBank suggests that inventories could shrink further before a recovery begins in 2027. This shortage comes at a critical time, as $10 billion worth of new dairy processing plants are scheduled to come online over the next two years.
The decline in heifers is linked to shifts in cattle markets. Record high beef prices and tight cattle supplies led many dairy farmers to breed more calves for beef feedlots instead of the dairy herd. At the same time, raising dairy heifers became unprofitable due to high costs and low values. Although values have now surged, it takes more than three years for newborn heifers to reach the milking herd.
CoBank estimates that the shortage could deepen, with inventories declining by nearly 800,000 head before 2027. Heifer prices are already hitting record highs and may rise above $3,000 per animal.
Artificial insemination trends show how dairy farmers adapted. From 2017 to 2020, beef semen sales nearly tripled, with most purchases coming from dairy farmers. By 2024, over 7.9 million units of beef semen were sold to dairies, reflecting a strong shift toward beef production.
Farmers are now trying to address the shortage by buying more gender-sorted semen to produce female dairy calves. However, rebuilding herds will take years.
“The U.S. dairy industry stands at a unique inflection point,” said Corey Geiger, lead dairy economist with CoBank. “Beef sales are contributing a larger share of dairy farm profitability with each passing year and the market for beef-on-dairy calves shows no signs of slowing down. In order to maintain sufficient dairy cow numbers and milk production in the near term, dairy farmers will need to put the brakes on dairy cow culling. And that could be difficult given how much they’ve already pulled back over the past two years.”
The heifer shortage raises major questions about whether the US can supply enough cows to meet growing demand.
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