Grass-Fed Angus: Defining the Claim, Forage Quality and Finishing on Grass

Few phrases on a beef label draw as much attention, and confusion, as grass-fed. To customers it suggests a certain kind of cattle, pasture and farm. To a producer it is a claim that has to be documented and a way of raising cattle that works differently from feedlot finishing. Angus cattle can be finished on grass, but doing it well takes forage, planning and the right animals.

This guide explains the claim, the production requirements and the trade-offs. Federal labeling guidance is updated periodically, so confirm current requirements with USDA before you label or advertise. If you want to find grazing and grass-finishing workshops near you, agriculture.directory can help you find agriculture events in your area.

What the Claim Has to Mean

For years, the USDA Agricultural Marketing Service ran a voluntary grass-fed marketing claim standard. According to farm press coverage, AMS withdrew that standard in 2016, saying that the Food Safety and Inspection Service has the legal authority over label claims, and FSIS then issued labeling guidance saying that a grass-fed claim requires a signed and dated document describing how the animals were raised. Advocacy groups noted that FSIS guidance treats a grass-fed claim as meaning cattle fed only grass, which is the 100 percent grass-fed standard, after being weaned from their mothers' milk. More recently, FSIS published an updated guideline in August 2024 on substantiating animal-raising and environment-related claims, with the Federal Register notice stating that labels bearing special claims must be submitted to FSIS for approval, and legal summaries of the 2024 update noting that claims certified by a third party are approved only if the label names the certifier and where its standards can be found. Read the Federal Register notice on animal-raising and environment-related claims and check the current FSIS guidance, since rules may have changed again. Our guide to beef labels explains how buyers read the claim.

Grass-Fed Does Not Mean Organic or Hormone-Free

A grass-fed claim speaks to diet. It does not by itself say anything about antibiotics, hormones or organic status. Those are separate claims with their own requirements. Keep claims separate in your marketing, and do not imply that grass-fed also means something else unless you can document it.

What Grass Finishing Requires

1. High-quality forage. Cattle gain well on young, leafy, digestible forage, and poorly on mature, stemmy forage. Finishing is a nutrition challenge, since grass is lower in energy density than grain-based diets. Forage species, fertility and grazing management matter. See rotational grazing for beef cattle.
2. Year-round feed planning. Cattle finishing in winter need stored forage, stockpiled pasture or other grass-based feed that meets the claim. Test forages to know their quality.
3. Suitable cattle. Frame size and maturity matter. Large-framed, late-maturing cattle may not fatten on grass. Moderate-framed cattle that finish at lighter weights often suit grass systems better. Our guide to registered versus commercial heifers and the EPD guide help with selection.
4. Time. Grass-finished cattle often reach market condition at older ages than grain-finished cattle, which means more days of cost, more forage and a longer wait for income.
5. Low stress and steady gain. A slump from drought, heat or poor feed can cost weeks of gain and affect eating quality.

Carcass and Eating Quality

Grass-finished beef is typically leaner than grain-finished beef, and marbling is usually lower, so fewer carcasses grade Choice or Prime under USDA grading. Our beef grades guide explains how marbling drives grades. Flavor is different too, and many consumers describe it as more pronounced or earthy. Consistency is harder, because forage quality changes through the year. Customers who expect grain-fed marbling may be disappointed, so describe the product honestly and teach cooking methods suited to leaner beef, as the steak doneness guide shows. Resources from ATTRA on grass-fed beef cover production and marketing in more depth.

Winter and Drought

Grass is seasonal. Producers who finish cattle year-round use stockpiled forage, high-quality hay or baleage, and sometimes forage crops grown for winter grazing. Drought can reduce pasture growth and force early sales or purchased feed that may not meet your claim. Plan reserves and keep a drought plan, as our winter feeding guide discusses for cows.

Costs and Economics

Grass finishing can lower purchased feed costs, but it uses more land, more time and often more labor. Premium prices may offset the cost, but only if you have buyers. Do the numbers using the approach in the cow-calf budget guide, and include the extra months, the land and the processing cost per head. Many grass-fed producers sell direct, because wholesale grass-fed markets can be thin. Our guide to selling beef direct covers the sales paths.

Marketing the Claim Honestly

• Keep records of birth dates, pastures, feeds and purchases to back up the claim.
• Do not buy in cattle or feed that would break the claim.
• If you use a third-party certifier, follow its standards and name it as required.
• Be accurate about marbling, tenderness and flavor.
• Avoid environmental claims you cannot support. Federal guidance encourages data and documentation for such claims.

Farm.fm's page on rotational grazing techniques for pasture health adds grazing background.

Parasites and Health

Cattle on pasture face parasite pressure, and some treatments may conflict with claims or certifier rules, so plan with your veterinarian. See cattle parasite control basics and the vaccination guide.

Common Mistakes

• Using the label without documentation. Claims must be substantiated.
• Finishing cattle that are too large-framed. They may not fatten on grass.
• Not planning winter feed. Quality drops and gains stall.
• Promising marbling. Grass-finished beef is usually leaner.
• Skipping the numbers. Extra time costs money.

For a laugh, see farm.fm's piece on a ranch stocking rate calculator that recommends 60 cows when drought votes for six.