Why Most Angus Carcasses That Miss CAB Miss on Marbling

When producers talk about missing the Certified Angus Beef brand, the conversation often turns to size: carcasses too heavy, ribeyes too big, too much fat. The data say something different. In the brand's latest supply study, reported in the Angus Journal, insufficient marbling was the reason for 81.8 percent of non-qualifying carcasses. Size and fat limits matter, but they are secondary. This article explains how to read that figure and what to do with it.

What the number means, and what it does not

The figure describes carcasses that did not qualify for the brand, not all carcasses. According to the Angus Journal column, the data come from the brand's annual multipacker, seasonally weighted supply study of nearly 2 million Angus-influenced carcasses. Of those that missed, the shares by reason were 81.8 percent for insufficient marbling, 14.5 percent for hot carcass weight over 1,100 pounds, 9.8 percent for backfat over 1 inch and 9.5 percent for ribeye over 17.0 square inches. They add up to more than 100 percent because a carcass can miss on more than one count. The same pattern appeared in earlier reports: Drovers reported that marbling was the main reason Angus-type carcasses failed in 2024, at 82 percent of failures, so the finding is stable, not a one-year blip.

Across all Angus-influenced cattle processed in licensed plants, the column reports a 37.6 percent acceptance rate in 2025, an all-time high. Even at that level, most of the cattle that did not qualify fell short on marbling.

What qualifies as enough

The brand requires modest or higher marbling, which sits at the entry point of the Premium Choice range on the USDA marbling scale. That means a carcass with slight or small marbling will miss no matter how well it meets the other nine specifications. Our guide to USDA beef grades shows where each marbling degree falls.

Why marbling is the hard one

• It is genetic: Marbling is a moderately to highly heritable trait, which means selection works, but only if you select for it.
• It is hard to see: You cannot judge marbling on a live animal with any precision. Ultrasound can estimate it, and carcass data confirm it.
• It takes time: Genetic change takes generations, so a bull bought this year affects calves that sell in about two years.
• It competes with other goals: Selecting only for growth or calving ease can erode marbling over time.

Comparing qualifiers and non-qualifiers

The column also reports averages for the two groups. Carcasses that made the brand averaged a 14.6-square-inch ribeye, 0.65 inches of backfat and 923 pounds. Those that missed averaged a 15.2-square-inch ribeye, 0.63 inches of backfat and 949 pounds. In other words, the misses were a bit heavier with slightly larger ribeyes, but not fatter. The difference that mattered most was marbling, not fat cover. A carcass can be lean and large and still lack the intramuscular fat the brand requires.

What to do on the genetics side

1. Look at marbling EPDs when you buy bulls. Our guide to reading an EPD sheet explains how to compare them, and farm.fm's page on Angus genetics for quality and profitability covers the broader picture.
2. Use carcass data from your own cattle. Ask the packer for sheets, and match them to sire and dam where you can.
3. Balance the trait. Marbling is one of several. A bull that improves it but harms fertility or calving ease can cost more than he returns. The American Angus Association's resources include selection indexes designed to weigh multiple traits.
4. Consider genomic testing for young animals where you want earlier information on marbling.

What to do on the feeding side

Nutrition cannot create genetic potential, but it can fail to reveal it. Cattle that are under-finished, stressed or harvested too early may fall short of their ability. Farm.fm's page on nutrition for Angus herds discusses programs, and our guide to finishing and marbling covers age, ration and timing. Be careful, though. Feeding longer to chase marbling can push weight and fat over their limits, so the goal is to reach the target at the right point and stop.

A note on selection pressure and balance

Producers sometimes read the 81.8 percent figure as a reason to select only for marbling. That is the wrong takeaway. A cow herd needs fertility, longevity, calving ease and growth to remain profitable, and a carcass trait does not pay if the cow does not breed back. The figure is a signal about priority within carcass selection, not a replacement for a balanced breeding program.

Before you act

Figures and specifications are updated regularly, so check the brand's and the Association's current documents. The University of Nebraska beef program and the Beef Research site publish related material. For service providers near you, the agriculture directory can help.

The takeaway is simple. If most missed cattle missed on marbling, then the most productive place to improve your odds is in the pedigrees of the cattle you breed, and the data you collect to check your progress.