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
A high-stakes legal case in a South Dakota federal court concerning misleading country-of-origin labeling (MCOOL), such as “Product of the USA,” on food products, will significantly impact U.S. agricultural policy for years to come.
Agronomy experts explain why standing crop residue protects soil and reduces costs for crop growers, while shredding often yields little benefit at higher costs.
Secretary Rollins also met with specialty crop producers at a local strawberry farm to discuss workforce needs and the Trump Administration’s recent wins related to significantly cutting the cost of H-2A labor for California farmers.
Brent Graves, auctioneer and mentor, shares his journey supporting youth in agriculture, livestock competitions, and how he is turning junior livestock auctions into a classroom for youth in agriculture.
China’s beef policy risk stems from domestic volatility, making export demand inherently unstable. Jake Charleston with Specialty Risk Insurance offers his perspective on cattle markets, risk management, and producer sentiment.
Larger grain stocks increase supply pressure, but strong fall disappearance — especially for corn and sorghum — suggests demand remains an important offset.

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:

Smaller U.S. production and steady global demand could provide better pricing opportunities in 2026.
Higher yields are cushioning lower acreage, but reduced production could support firmer potato prices into 2026.
Producers across the country balanced winter weather disruptions, shifting export demand, and tightening margins as year-end decisions come into focus.
Reviewing risk management now can help dairy and livestock producers enter 2026 with clearer margins and fewer surprises.
Stronger rail movement and lower fuel prices are easing logistics, even as export pace and river conditions remain uneven.
Small, locally focused wineries are finding resilience through direct sales and regional loyalty rather than scale alone.
Agriculture Shows
Special 3-part series tells the story of the Claas family’s legacy, which changed agriculture forever.
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.