Cow Size Matters When Evaluating Calf Weaning Performance

Bigger cows must wean proportionally heavier calves to justify higher ownership costs.

Grazing cattle, various breeds

Carrie – stock.adobe.com

NASHVILLE, Tenn. (RFD-TV) — Weaning weights alone can be misleading when comparing cow performance, especially in herds with wide variation in mature cow size. That’s a key point highlighted by Kenny Burdine, livestock economist with the Kentucky Cooperative Extension Service, as producers review records and make culling decisions.

Larger cows often wean heavier calves, but they also cost more to maintain. Bigger cows consume more forage, hay, supplements, and minerals — and they often carry higher indirect costs tied to health, handling, transportation, and yardage. When culling decisions are based strictly on calf weaning weight, smaller-framed cows are more likely to be removed, gradually increasing average cow size and pushing herd costs higher over time.

Burdine’s analysis suggests producers should view productivity relative to cow size, not just raw calf pounds. In a budgeting exercise, he found that for every additional 100 pounds of mature cow weight, a cow needed to wean roughly 50 more pounds of calf just to stay economically competitive. That relationship shifts with cattle prices, but the principle remains consistent.

Tracking individual cow-calf performance helps identify which cows are truly earning their place.

Related Stories
As we continue our Countdown to Convention presented by Culver’s, we meet some of the people who help bring the event to life.
The President’s trip to Asia this week follows a trade mission by the Iowa Soybean Association. Farmers say they were reminded that U.S. soybeans have an international reputation that can be easy to take for granted here at home.
Harvest Marches on as River Logistics And Inputs Steer Bids
Imported lean beef continues to play a critical role in U.S. hamburger and ground-beef production, with any added volume from Argentina serving as a supplement — not a market overhaul.
A fast-moving series of trade signals from the White House and key partners is resetting the near-term outlook for U.S. agriculture.
Stay alert for trade announcements—especially border reopening timelines, tariff threats, and developments in Brazil’s export flows.
Margin Protection and the new MCO add county-level margin tools — with earlier price discovery, input cost triggers, and high subsidy rates — to complement on-farm risk plans for 2026.
R-CALF USA CEO Bill Bullard joins Market Day Report for his insight on the USDA’s plan to strengthen the U.S. beef industry.
For our Countdown to Convention with Culver’s, we explore how the sea of FFA blue impacts local businesses.

Tony St. James joined the RFD-TV talent team in August 2024, bringing a wealth of experience and a fresh perspective to RFD-TV and Rural Radio Channel 147 Sirius XM. In addition to his role as Market Specialist (collaborating with Scott “The Cow Guy” Shellady to provide radio and TV audiences with the latest updates on ag commodity markets), he hosts “Rural America Live” and serves as talent for trade shows.

LATEST STORIES BY THIS AUTHOR:

The Senate has cleared a path to reopen USDA, but full restoration of services depends on House approval and the President’s signature.
Verified U.S. data show real leather’s carbon footprint is lower than advertised — an edge for the American cattle industry in both marketing and byproduct value.
Stagger buys and diversifies fertilizer sources — watch CBAM, India’s tenders, and Brazil’s import pace to time urea, phosphate, and potash purchases.
Tight cattle supplies keep prices high for ranchers, but policy shifts, export barriers, and packer losses signal a volatile road ahead for the beef supply chain.
Distillers dried grains (DDG) values follow corn and soybean meal trends, with ethanol grind and feed demand shaping costs into early 2026.
Pork producers should prioritize health and productivity gains, hedge feed and hogs selectively, and watch Brazil’s export pace and China’s sow policy for price signals.
Agriculture Shows
From soil to harvest. Top Crop is an all-new series about four of the best farmers in the world—Dan Luepkes, of Oregan, Illinois; Cory Atley, of Cedarville, Ohio; Shelby Fite, of Jackson Center, Ohio; Russell Hedrick, of Hickory, North Carolina—reveals what it takes for them to make a profitable crop. It all starts with good soil, patience, and a strong planter setup.
Champions of Rural America is a half-hour dive into the legislative priorities for Rural America. Join us as we interview members of the Congressional Western Caucus to learn about efforts in Washington to preserve agriculture and tackles the most important topics in the ag industry on Champions of Rural America!
Featuring members of Congress, federal and state officials, ag and food leaders, farmers, and roundtable panelists for debates and discussions.
The goal of “Where the Food Comes From” is as simple as its name implies — host Chip Carter takes you along on the journey of where our food comes from — and we don’t just mean to the supermarket (though that’s part of the big picture!). But beyond where it comes from, how it gets there, and all the links in the chain that make that happen.
Join markets specialist Scott Shellady, better known as the Cow Guy, as he covers the market-close, breaking down headlines that drive the commodities and equities markets with commentary from respected industry heavyweights.