Culling a cow means permanently removing her from the herd. The cow isn’t being kept for breeding, milking, or raising calves anymore. In most cases, a culled cow is sold and eventually slaughtered for beef, though culling itself refers to the decision to remove her, not the method of slaughter. It’s a routine part of both dairy and beef operations, driven by economics, health, and productivity.
Why Farmers Cull Cows
Culling is a multifactor decision shaped by the individual cow’s condition, the herd’s overall needs, and market economics. The most common reasons fall into a few categories:
- Reproductive failure: A cow that doesn’t get pregnant (called an “open” cow) consumes feed without producing a calf to sell. This is consistently the number one reason for culling across both beef and dairy herds.
- Low milk production: In dairy operations, a cow that doesn’t meet production expectations becomes a financial drain. Even high-producing cows can be culled if their output drops sharply due to age, disease, or nutrition problems.
- Mastitis: Udder infection is the most economically significant disease in the dairy industry. Clinical mastitis can reduce a cow’s milk output by roughly 336 kg per lactation cycle and also disrupts reproduction, making the cow a candidate for culling on two fronts.
- Lameness and injury: Damaged hooves, poor foot structure, or leg injuries make it painful and difficult for a cow to move, graze, and breed.
- Age and physical wear: Worn or missing teeth limit a cow’s ability to eat enough to maintain body condition. Old age brings declining fertility and productivity.
- Udder problems: Dry quarters (teats that no longer produce milk) or structurally poor udders reduce a cow’s value in both dairy and beef-calf operations.
The Difference Between Voluntary and Involuntary Culling
Not every culling decision is made on the farmer’s preferred timeline. Voluntary culling happens when a farmer strategically removes a cow to make room for a better-performing replacement. The cow might still be functional but is underperforming compared to the rest of the herd. Involuntary culling happens when an injury, disease, or reproductive failure forces the farmer’s hand. A cow with a severe case of mastitis that won’t resolve, for example, leaves little choice.
External pressures also drive culling. Drought reduces the amount of available forage, and high feed costs make it expensive to keep marginal animals. When feed is scarce and expensive, agricultural economists have found that partial herd liquidation (selling off less productive cows) tends to provide better financial returns and less risk than purchasing extra feed to keep the whole herd intact.
How Culling Works in Practice
Most farmers evaluate their cows during routine processing events like weaning. This is when they check pregnancy status, inspect udder quality, assess teeth and hoof condition, and score body condition on a standardized scale. Cows that fail on one or more of these checks are flagged for removal.
Pregnancy testing is especially important. Economic modeling from the University of Wisconsin shows that a farmer needs roughly six calves from a cow just to recover the initial investment of raising her replacement. If a cow misses one calving season due to failure to conceive, that number jumps to eight. Missing two seasons pushes it past nine. An open cow eating feed all winter with no calf income is one of the fastest ways to lose money in a cow-calf operation.
Where Culled Cows End Up
In North America, most culled dairy cows pass through a livestock auction on their way to a slaughter facility. Some are sold directly to processing plants. The beef from culled cows is leaner and tougher than meat from cattle raised specifically for beef, so it goes into different products. Lean trimmings from cull cows and bulls (graded as “90s,” meaning about 90% lean) are blended with fattier trimmings from grain-finished cattle (“50s”) to create the 80/20 ground beef you see at the grocery store. About a third of all U.S. beef production comes from cull dairy and beef cows.
Savvy farmers time their sales to maximize what’s called “salvage value,” the money a culled cow brings at market. A cow sold in better body condition, or one that’s bred and can be sold to another operation as a pregnant cow, brings significantly more than a thin, open cow sold in the fall when the market is flooded with other culled animals. Some producers add weight to open cows before selling them in the spring when prices rise, moving the animal from a “lean” market classification into a higher-value one.
How Culling Rates Shape the Industry
The national average culling rate for U.S. dairy herds is about 35%. That means roughly one in three dairy cows is replaced every year. This constant turnover is partly why dairy farming requires a steady pipeline of replacement heifers and why the economics of raising those replacements matter so much. Cow depreciation (the difference between what a cow cost to acquire and what she’s worth when she leaves the herd, spread over her productive years) is typically the second or third largest expense in a cow-calf operation, right behind feed costs.
Reducing depreciation is one of the most effective ways to improve a cattle operation’s profitability. The math is straightforward: get more productive years out of each cow, or get more money for her when she leaves. Both strategies require better herd health, tighter breeding management, and strategic marketing of the animals that do get culled.
Animal Welfare During the Culling Process
Federal and industry guidelines emphasize that cows identified for culling should be handled calmly and transported humanely. Animals at risk of going down (becoming unable to stand) should be processed at a local facility rather than loaded for long-distance transport. USDA handling standards specify non-slip flooring, minimal noise, no electric prods, and rest stops with feed and water for hauls longer than ten hours. During extreme heat, cattle should be transported at night with sand bedding and access to misters or sprinklers at rest stops.
The practical concern for farmers is identifying cows early enough that they’re still in good enough condition to be transported and sold. A cow culled promptly when problems first appear is mobile, marketable, and handled with less stress than one whose condition has deteriorated to the point where transport itself becomes a welfare risk.