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 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.
Herd rebuilding looks slow, keeping cattle prices supported; beef-on-dairy crosses help fill feedlots, while imports temper—but don’t erase—tightness.
“We believe that it is just a matter of days or weeks... before we see New World screwworm in Texas.”
Rollins says the new trade relationship with Taiwan, which is committed to buying a significant amount of U.S. soy, could not come at a better time for farmers facing financial strain.
Let’s meet an inspiring young farmer leading the Tennessee FFA this year, but now has his sights set on the National stage.
USMEF CEO Dan Halstrom joined us on Monday’s Market Day Report for his analysis on the U.S.-Taiwan trade agreement, which includes big bucks for U.S. Beef.
Fewer cattle on feed suggest smaller slaughter numbers this winter, which could support strong prices if beef demand holds firm.

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:

Crop insurance remains a vital tool for managing climate-driven risk.
Expect firm demand for dependable HRS and SW, steady movement in HRW, more sorting on SRW, and selective bids on durum until full milling results are released.
Reversion would sharply increase dairy prices and raise crop supports, driving up government costs and consumer prices while unsettling markets—even as crop insurance remains in place.
Treat financial stress as a health risk—know the warning signs, normalize conversations, and connect farm families to local and national support early.
Congress has just over a month of working days left for the year. Plan for uneven USDA service until funding is restored, and closely monitor Farm Bill talks, as avoiding Permanent Law before January 1 is the single biggest risk to markets and milk prices.
Mexico’s tougher, two-step treatment and added checkpoints are catching cases before they can spread—good news for producers near the border.
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.