US dairy heifers at 47-year low

Friesen cows feeding from trough on dairy farm
Dairy replacement heifers have dropped nearly 1% YoY in 2025. (Monty Rakusen/Getty Images)

Tight inventory numbers could stunt milk production growth in the US, experts warn

A long-anticipated USDA report into cattle numbers has revealed a 0.9% decline in dairy replacement heifers at the start of the year.

In January 2025, there were only 3.914 million replacement heifers in the national herd – compared to last year’s 3.951m. These are the lowest stock levels since 1978.

Meanwhile, the number of heifers expected to calve also fell by 0.4% versus 2024 to just 2.5 million head.

“A lack of available heifers is likely to keep milk production growth constrained, even as margins persist at levels that should encourage expansion,” explained Quarterra’s Monica Ganley for the Milk Producers Council.

Meanwhile, dairy cows were slightly up on last year, at 9.35 million head versus 3.46 million in 2024.

The 2025 margin over feed is expected to remain higher than historical levels, at $13.37/cwt.