Dairy herd culling includes planned removals and departures driven by health, fertility or welfare problems. Recording the reason for each cow's exit helps managers distinguish a deliberate replacement decision from a problem that needs investigation.
The two main types of dairy cow culling are voluntary (economic) culling and involuntary (health- or welfare-related) culling. Voluntary culling is a planned decision, often involving low production or herd restructuring. Involuntary culling occurs when health, fertility or other constraints leave the manager with fewer practical options. In real herds, however, a cow's removal may involve both economic and biological factors.
The aim is not to drive the culling rate as low as possible. It is to keep healthy, productive cows when their future value justifies it, make timely and humane decisions when it does not, and reduce avoidable health-related removals.
What Are Voluntary and Involuntary Culling?
Voluntary culling: a planned management decision
Voluntary culling is usually described as removing a cow for economic or herd-management reasons when there is a realistic choice to retain her. Examples include:
- Persistently low milk production relative to the farm's costs and alternatives.
- Replacing a healthy but lower-value cow when a suitable heifer is ready to enter the milking herd.
- Adjusting herd size when barn capacity, milk contracts or business goals change.
- Selling a suitable animal to another dairy for breeding or production.
A low-producing cow is not automatically unprofitable. Her feed cost, pregnancy status, expected future yield, replacement availability and market value may all change the decision.
Involuntary culling: health or reproduction limits the options
Involuntary culling commonly involves conditions such as recurring mastitis, severe or chronic lameness, infertility, injuries and some metabolic or digestive problems. A cow may still be producing substantial milk when one of these problems makes continued production uneconomic or unacceptable from an animal-welfare perspective.
The boundary is not always clear. A cow with repeated mastitis, for example, may be physically capable of staying in the herd, while her expected milk income, treatment prospects, infection risks and future fertility influence the final decision.
| Question | Voluntary culling | Involuntary culling |
|---|---|---|
| Main driver | Economic or planned herd decision | Health, injury, fertility or welfare constraint |
| Typical example | A sound, low-yield cow replaced by a higher-value heifer | A cow with severe recurrent lameness and a poor prognosis |
| Degree of choice | Often relatively high | Often limited by clinical circumstances |
| What to review | Future income, feed costs, replacements, cow sale value | Veterinary prognosis, pain and mobility, infection risk, recovery cost |
| What good management looks like | A documented comparison of keeping versus replacing | Prompt veterinary assessment and humane, timely action |
Important distinction: A cow sold or transferred, a cow that dies on the farm, and a cow that is euthanized are different outcomes. Some herd-turnover reports combine them, but farm records should identify each separately. That distinction is essential when diagnosing preventable losses.
For a broader explanation of the categories and their limits, see Penn State Extension's guide to dairy cull rates.
What Are the Most Common Reasons Dairy Cows Leave a Herd?
There is no single ranking that applies to every country or farm. The leading reasons depend on herd structure, milk prices, fertility management, housing and how the farm records the primary cause.
Common reasons include:
- Low milk production: the cow's expected return may no longer justify her ongoing costs or the stall she occupies.
- Udder health problems: repeated clinical mastitis, persistent infection or an udder that can no longer be milked comfortably and effectively.
- Reproductive problems: long intervals without pregnancy, repeated unsuccessful breeding or permanent reproductive damage.
- Lameness and hoof disorders: reduced mobility, pain, poorer feed access and recurring treatment needs.
- Transition and metabolic disorders: complications around calving that affect appetite, recovery and the next lactation.
- Injury, other disease or death: cases that may require urgent veterinary, welfare or biosecurity decisions.
What can a regional report tell us?
A secondary summary published in December 2025 about dairy cow removals in Hebei, China discusses records collected between October 2022 and November 2023. It identifies low production, udder disease and reproductive problems among the recorded removal reasons.
Use a regional report to identify questions for your own herd: which reasons are being recorded, whether diagnoses are consistent, and when removals occur during lactation. Compare those patterns with the farm's complete herd records.
At What Age or Lactation Are Dairy Cows Most Likely to Be Culled?
There is no universal age or parity at which dairy cows should automatically be culled. Decisions depend on individual health, milk production, pregnancy, expected future performance and replacement economics.
An age or parity breakdown of removed cows describes who left the herd. To compare the risk of removal, also count all cows in each age or parity group during the same period. A large share of removals in one group may simply reflect a large number of cows in that group.
To estimate a parity-specific removal rate, a farm needs both:
- The number of cows removed from that parity group during a defined period.
- The number of cows at risk in that group over the same period, ideally accounting for their time in the group.
For example, if 12 third-parity cows leave a herd over a year, the meaning is very different when the herd maintained about 60 third-parity cows versus 200. The numerator alone cannot answer the risk question.
Rather than drawing an age threshold from someone else's chart, compare the reasons for removal within first-lactation, second-lactation, third-lactation and older-cow groups. That can reveal whether the farm is losing promising young cows early, encountering repeated problems around calving, or retaining older cows with declining welfare or performance.
Should You Treat, Keep or Cull a Sick Dairy Cow?
A culling decision should not begin with milk yield alone. Start with animal welfare and veterinary prognosis, then evaluate the likely value of keeping the cow compared with a suitable replacement.
1. Determine whether recovery is realistic
With veterinary guidance, consider:
- Is the condition reversible or manageable?
- Can the cow stand, walk, rest, eat and drink without unacceptable pain?
- Is she likely to return to a functional milking and reproductive state?
- Does she present an infectious risk requiring special management?
- Are there legal disease-control or milk-withholding requirements?
Serious suffering or a poor clinical outlook cannot be justified by a high previous milk record. Where recovery is not reasonable, a veterinarian should guide timely humane decisions, including euthanasia when appropriate. Sick, severely lame or non-ambulatory cattle should not be shipped simply to recover sale value. Follow local transport and animal-health rules.
2. Compare expected future value, not just past performance
If treatment is clinically appropriate, compare the cow's expected future milk income and other value with the additional costs of feed, treatment, discarded milk, breeding and management. Then compare the likely outcome of replacing her with an available heifer or purchased cow.
A simple starting point is:
Expected return from keeping the cow = expected future milk revenue and other receipts − expected future variable costs and health-related losses.
This is a decision framework, not a complete farm-profit calculation. Replacement cost, time until the heifer enters production, salvage value, housing capacity and longer-term risk also matter.
For example, a cow's current milk receipts may still cover daily feed costs while her repeated clinical disease makes future production uncertain. Conversely, a healthy pregnant cow with temporarily lower production may be worth keeping if replacement animals are scarce or expensive.
Research-based guidance from Penn State Extension explains why milk price, feed costs, available replacements and herd goals all influence the decision.
3. Define a review point
For cows receiving treatment or recovery management, record a veterinarian-approved review date and what improvement is expected: mobility, pain, feed intake, udder condition, milk quality, body condition or reproductive status. Do not continue treatment indefinitely without reassessing the prognosis and the cow's welfare.
Why Do Preventable Health Problems Lead to Involuntary Culling?
When similar health-related removals recur, review the daily conditions and management steps shared by the affected cows.
Mastitis and milking management
Repeated udder-health problems may be associated with infection control, milking hygiene, teat condition and equipment performance. Before deciding an entire parlor must be replaced, inspect:
- Vacuum stability and pulsation performance during actual milking.
- Liner condition, suitability and replacement interval.
- Automatic cluster-removal settings and evidence of overmilking or teat-end damage.
- Pre-milking preparation, post-milking teat disinfection and equipment cleaning.
- Cow-level mastitis history, culture results where available, and milk-quality trends.
A milking machine is one part of the system. Maintenance, operator technique and veterinary udder-health protocols matter just as much as equipment specification.
Hoof disorders, flooring and cow comfort
Lameness can reduce feed access and resting comfort, affecting production and fertility. A useful facility inspection starts with wet or slippery alleys, sharp turns, damaged flooring, overcrowding, standing time, hoof-care routines and the condition of the stalls.
Better freestall design and maintenance can support cow comfort, but simply adding rubber mats will not correct poorly sized stalls, dirty bedding or a crowded barn.
Transition-cow management
Around calving, appetite and metabolic demands can change rapidly. A cow recovering from a difficult transition may experience several connected problems, including reduced intake, metabolic disease and delayed reproductive recovery.
Review close-up and fresh-cow grouping, access to feed and water, crowding, heat stress, comfort and timely health checks. If many cows leave early in lactation, investigate the transition program before treating those removals as unrelated cases.
Heat stress and fertility
Heat stress may reduce dry matter intake and reproductive performance. Check shade, air movement at cow level, effective soaking and drainage, water access and the milking holding area. Fans alone are not a complete heat-abatement plan; system performance depends on climate and how air movement, water application and barn drainage work together.
University of Wisconsin–Madison Extension explains the link between heat stress and dairy cow fertility.
How Do You Know If Your Dairy Herd's Culling Rate Is Too High?
A single annual percentage is not enough. A farm expanding rapidly may have a different replacement strategy from a stable herd. Milk price, heifer supply, disease outbreaks and changes in recording rules can all alter the observed rate.
Start by using a consistent definition. One practical herd-turnover measure is:
Annual removals (%) = cows leaving the adult herd during the year ÷ average adult-herd inventory during the year × 100.
If 180 cows left a herd averaging 600 adult cows during the year, its annual removal proportion would be 30%. This does not tell us whether 30% was desirable. We still need to know who left, when and why.
Record deaths and euthanasia separately from animals sold or transferred. If a reporting program combines them into a total turnover metric, use the same definition every time you compare periods.
Three especially useful measures are:
- Early-lactation removals and deaths: monitor cows lost within the first 60 days after calving, using a defined calving cohort for comparisons.
- Primary causes of removal: separate poor production, mastitis, lameness, reproduction, transition disorders and other recorded causes.
- Cause and timing by parity: check whether first-lactation cows, mature cows or older groups are disproportionately affected after accounting for the number of animals in each group.
The 60-day measure should use a consistent denominator, such as cows that calved and had a complete 60-day observation period. Do not divide early-lactation removals by the entire milking herd and label the result an early-lactation risk.
If the rate rises, first compare the affected groups and causes with the farm's own previous periods, then investigate management changes. Do not immediately purchase new equipment to solve an undiagnosed problem.
What Should a Dairy Farm Record for Every Culled Cow?
A practical record system is more useful than a long report that nobody updates. For a 300–1,000 cow herd, the following information provides a workable starting point.
| Record | Why it matters |
|---|---|
| Cow ID | Connects the removal to production, treatment and breeding records |
| Birth date or age | Identifies age group at departure |
| Parity | Enables comparison across lactation groups |
| Most recent calving date | Places the event in the production cycle |
| Date of removal | Supports monthly and annual tracking |
| Days in milk | Shows when in lactation the cow left |
| Recent milk yield | Adds production context to the decision |
| Primary reason | Provides a consistent, analyzable main category |
| Secondary contributing factors | Captures repeated disease or other relevant constraints |
| Decision type and final outcome | Distinguishes planned sale, health-related sale, transfer, death or euthanasia |
| Responsible decision-maker | Supports clinical and management follow-up |
Use a small, consistent list of primary reason codes. Avoid recording every difficult case as other. When multiple problems exist, choose a primary reason according to the farm's agreed rules and record the others as secondary factors.
Every month or quarter, review the results by reason, parity and days in milk, and look for repeated problems that a specific management change could address.
Can Dairy Equipment Reduce Involuntary Culling?
Better equipment can help address certain risk factors, but equipment alone cannot guarantee fewer culls. The right investment depends on what the farm's records actually show.
| Repeated problem | Check before purchasing | Potential equipment or facility response |
|---|---|---|
| Recurrent mastitis or teat damage | Milking vacuum, pulsation, liners, cluster removal, sanitation and staff practice | Replace worn components, correct settings or consider a parlor upgrade if justified |
| Frequent lameness | Wet flooring, overcrowding, hoof care, stall geometry and bedding | Improve drainage, resting surfaces, flooring or manure removal where needed |
| Fresh-cow losses | Transition diet, feed and water access, grouping and health checks | Improve close-up pens, feed barriers, water access and cooling where the investigation supports it |
| Summer fertility decline | Heat-stress exposure, airflow, soaking and drinking-water access | Review barn fans, soaking systems and environmental controls together |
| Slow detection of recurring problems | Herd records, routine observation, treatment follow-up | Improve reliable data collection and staff workflows before adding monitoring technology |
Review the existing milking systems, cow comfort infrastructure and barn environment equipment against the problems recorded on the farm. Define the equipment fault or layout constraint before comparing repair, management changes and replacement options.
A farm with high mastitis-related removals may need liner replacement and a milking-performance check before a new parlor. A farm with many lame cows may need to repair slippery alleys, improve bedding or reconsider stocking density before investing in automation. The improvement should be chosen only after the likely causes are understood.
Frequently Asked Questions
Is voluntary culling always better than involuntary culling?
No. Planned removal can support herd profitability, but a poorly timed economic decision may discard a healthy cow with substantial future value. Involuntary removal may also be necessary to protect welfare or control disease. The quality of the decision matters more than its label.
Is low milk production a reason to cull a cow?
It can be, but only after reviewing the cow's stage of lactation, pregnancy, expected future milk income, feed costs, health and replacement alternatives. A single low daily milk reading is not enough.
Should a cow with mastitis be culled immediately?
Not automatically. The veterinarian should assess disease severity, likely pathogen, response to treatment, recurrence, milk quality, welfare and risks to the rest of the herd. Severe disease may require urgent action, while many cases need a documented treatment and review plan.
Does third parity mean a cow has the highest culling risk?
No. A high proportion of removed cows being in third parity is not the same as a high third-parity removal rate. The rate requires the number of third-parity cows at risk as the denominator.
What is a good annual dairy cow culling rate?
There is no one percentage that is optimal for every farm. Compare a consistently defined turnover rate with your own history, then separate the reasons, deaths, production stages and replacement strategy.
Can installing new barn equipment reduce culling immediately?
Not reliably. Improvements may reduce important risk factors, but results depend on correct diagnosis, installation, maintenance, animal care and time. Start with the farm's most frequent preventable problems.
Conclusion
Voluntary and involuntary culling are useful categories, but the strongest dairy-herd decisions go further. They consider a cow's welfare, likely recovery, future productive value, replacement options and the reasons similar cows are leaving the herd.
For farm managers, a practical sequence is:
Record each removal → Compare the causes and timing → Check animal health and the farm environment → Correct management failures → Invest in equipment only where it addresses a demonstrated need.
Assign a follow-up action and review date to recurring removal reasons. Use the next reporting period to check whether the change improved cow health, retention or replacement costs.
