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.
USDA data show that 2.1 million landlords rent out 347 million acres, emphasizing a rising dependence on leased farmland as owners age and land supply tightens. ASFMRA’s David Klein also shares his outlook on land trends in Illinois.
March 18, 2026 04:55 PM
·
From barns to show rings, producers and students say that livestock events offer economic opportunity and life lessons. Let’s take a look at some shows across the southeast in Georgia, Virginia and Louisiana.
March 18, 2026 04:21 PM
·
This year at CattleCon 2026, RFD Network’s Kirbe Schnoor caught up with Donna Emick from Pneu-Dart to get her perspective on why education, safety, and accountability matter in the field.
March 18, 2026 01:22 PM
·
Nebraska’s largest wildfire on-record has burned 650,000 acres, with three other major fires also burning across the state, destroying pastureland and threatening cattle.
March 18, 2026 12:53 PM
·
NCBA President Colin Woodall states that misinformation like this is damaging to cattle producers, the beef supply chain, and consumer confidence
March 18, 2026 12:09 PM
·
Producer input costs are rising faster than expected — and this latest PPI report does not reflect the last two weeks of geopolitical tension.
March 18, 2026 11:58 AM
·
