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.
Fewer placements and historically low marketings point to tighter cattle supplies ahead, with Nebraska and Kansas gaining ground as Texas feedlots face supply pressure and the threat of New World Screwworm.
September 24, 2025 03:40 PM
·
A new study by the National Grains and Feeds Association found that their industry generates $401.7 billion in economic output and supports over 1.16 million jobs nationwide.
September 24, 2025 02:41 PM
·
What is it like working cattle with an outbreak of New World Screwworm so close to home? Wayne Cockrell, with the Texas and Southwestern Cattle Raisers Association, joined us on Wednesday to discuss.
September 24, 2025 12:29 PM
·
UNL Animal Science Ph.D candidate Anna Kobza joined us on Tuesday’s
Market Day Report to share her agriculture story and tips for other producers hoping to share their ag stories online or with the media.
September 23, 2025 03:24 PM
·
Herd rebuilding looks slow, keeping cattle prices supported; beef-on-dairy crosses help fill feedlots, while imports temper—but don’t erase—tightness.
September 23, 2025 01:32 PM
·
“We believe that it is just a matter of days or weeks... before we see New World screwworm in Texas.”
September 23, 2025 11:08 AM
