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.
Texas A&M livestock economist Dr. David Anderson joins Tony St. James to discuss the geopolitical tensions and U.S.-Mexico border closure that are leading to sharp swings in the cattle market.
October 31, 2025 12:50 PM
·
Arizona producers are proving that desert farming and water conservation can coexist through technology, reuse, and efficiency — reinforcing both food security and environmental stewardship.
October 31, 2025 12:39 PM
·
Farm Bureau Economist Faith Parum discusses key outcomes from the U.S.-China trade agreement and the benefits of expanding trade across Southeast Asia.
October 30, 2025 03:25 PM
·
RFD-TV tax expert Roger McEowen discusses the renewed tax provision and how cattle producers can take advantage of it to recover investments in heifer retention and herd expansion more quickly.
October 30, 2025 01:23 PM
·
U.S. Senator Roger Marshall (R-KS) shares his perspective on the U.S.-China trade developments and their potential impact on American producers, farmers, and ranchers.
October 30, 2025 12:56 PM
·
The U.S.-China summit raises hopes for stronger exports and reduced barriers, but U.S. ag players should remain strategically cautious until concrete volumes and certifications materialize.
October 30, 2025 10:37 AM
·
