Dairy cows produce more milk for heifers than for baby bulls, according to new research from Kansas State University and Harvard University.
Researchers studied lactation records for more than one million dairy cattle across the country.
Their findings contradicted evolutionary biology theories that predicted bias was in favor of sons. The cows actually produced more milk for their female offspring.
“Daughters seemed to have the most dramatic effect on the initial development of the mammary gland because the bias against sons was greatest in the first lactation,” said K-State Department of Animal Sciences and Industry associate professor Barry Bradford.
The study also found that the sex of the first baby might determine the amount of milk produced for the following children.
The results were available in the scientific journal PLOS One.
China’s stricter inspection rules prompt Cargill to pause soybean exports from Brazil, briefly lifting U.S. soybean prices as traders anticipate potential shifts in global trade, as export demand remains supportive across all major U.S. commodities.
March 13, 2026 12:57 PM
·
Suderman joins Tony St. James in the RFD Studios to discuss how geopolitical tensions are triggering global transport disruptions, new inflation pressures, and other challenges for agriculture to navigate.
March 13, 2026 11:08 AM
·
Severe drought in South Texas is forcing ranchers to consider cattle sell-offs as feed and water supplies dwindle, threatening herd health and livestock operations.
March 12, 2026 05:09 PM
·
RealAg Radio’s Shaun Haney shares insights from new Real Agri-Studies research surrounding the relationship between farmers and their lenders and what it reveals about the current farm economy.
March 12, 2026 04:15 PM
·
Dr. David Anderson with Texas A&M University AgriLife Extension discusses how geopolitical tensions and the Middle East, along with export disruptions in the Chinese market, will shape cattle markets in the months ahead.
March 12, 2026 12:54 PM
·
A man accused of orchestrating a nationwide cattle investment fraud scheme has been arrested in California after being on the FBI’s wanted list.
March 12, 2026 11:33 AM
·
