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
UNL Extension’s Troy Walz discusses the Nebraska Ranch Practicum, where sessions are held, how producers can get involved, and what ranchers can gain from participating in the program.
The Ranger Road Fire in the Oklahoma Panhandle is now 65% contained after burning nearly 300,000 acres over the past week. Kevin Charleston of Specialty Risk Insurance Agency discusses wildfire recovery, livestock insurance considerations, and the importance of preparedness for producers across the Southern Plains.
Higher output keeps milk supplies ample, reinforcing expectations for softer dairy prices even as feed costs remain favorable.
RFD Farm Legal & Tax expert Roger McEowen shares guidance on the 45Z Clean Fuel Production Credit, its impact on renewable energy and agriculture, and what producers should know moving forward.
Singer-songwriter and RanchHER Clare Dunn reflects on the importance of National FFA Week, her time in FFA, and her commitment to advocating for agriculture and rural issues.
Border closures tied to the threat of New World Screwworm continue to stall Mexican fed cattle imports, tightening U.S. feeder cattle supplies over time — triggering feedlot closures that hinder herd rebuilding efforts, threaten the beef supply chain, and shrink production while consumer prices stay elevated.

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:

Stronger fuel demand supports corn usage despite a steady production pace.
Fertilizer still consumes an unusually large share of crop value.
Pollination costs remain volatile, raising planning risk for specialty crop producers.
The USDA Agricultural Outlook Forum highlights modest price support from tighter supplies across cotton, grains, dairy, livestock, and sugar into 2026.
Farm Bureau Economist Faith Parum discusses the latest Farm Bill proposal and the path ahead for Congress and U.S. agriculture.
President Donald Trump signed an executive order this week to accelerate domestic production of phosphorus and glyphosate, signaling that farm input availability is now treated as a national security risk.
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.