Losing a cow is a major financial hit for any dairy. But when that loss is unexpected and forced by disease, it hurts your bottom line even more.
There are two main types of culling: voluntary and involuntary. Voluntary culling is a planned business decision, usually for low milk production. Involuntary culling is when you are forced to remove a cow due to unexpected disease, injury, or failure to breed, which directly impacts profitability.
Understanding why cows are leaving your herd is the first step to building a more resilient and profitable operation. When we can turn involuntary culls into voluntary ones, we are taking back control of our business. Let's dig into the real numbers behind culling and see how we can improve our odds.
What Are the Biggest Reasons for Culling Dairy Cows?
You might think low milk yield is the main reason cows are culled. But diseases often force your hand, causing unexpected losses that you didn't plan for.
While low production is the single largest reason for culling (33.4%), the majority of culls are involuntary. Diseases related to the udder (15.0%), reproduction (14.9%), digestion (11.3%), and hooves (10.9%) combine to force more cows out of the herd than low performance alone.
In my work with farms, I've seen firsthand how these numbers play out. We recently analyzed data from 72 dairy farms, looking at over 12,000 culled cows. The results were very clear. While culling reasons can vary a bit by country, the core problems are almost always the same: health issues that cut a cow's productive life short. Low production is a straightforward business decision. But when a high-producing cow suddenly develops severe mastitis or can't get back in calf, that's a loss that really stings. These involuntary culls are where we lose the most money and potential.
Here is a breakdown of the culling reasons we found in our study:
| Culling Reason | Number of Cows | Percentage (%) |
|---|---|---|
| Low Production | 4,129 | 33.4% |
| Udder Diseases | 1,860 | 15.0% |
| Reproductive Diseases | 1,846 | 14.9% |
| Digestive Diseases | 1,396 | 11.3% |
| Hoof & Leg Diseases | 1,342 | 10.9% |
| Respiratory Diseases | 626 | 5.1% |
| Other Reasons | 1,168 | 9.4% |
| Total | 12,367 | 100% |
When Are Dairy Cows Most at Risk for Being Culled?
You might expect that only the oldest cows in the herd are culled. The surprising truth is that the biggest risk is in their mid-life, right during their most crucial production years.
Cows are most likely to be culled between 48-60 months of age, which often corresponds to their third lactation. This isn't old age; it's their peak production window. This shows that health and management issues are forcing cows out of the herd prematurely.
This pattern tells a critical story. We are not just losing cows; we are losing our most valuable and productive animals far too early. Instead of getting 5, 6, or more lactations from a cow, many farms are losing her at 3. This is a huge drain on efficiency and profitability. Let's look closer at the timing.
By Age (Months)
The data shows a massive spike in culling between 48 and 60 months of age. A staggering 52.8% of all culled cows fell into this age group. These are 4- to 5-year-old cows. They should be at the top of their game, paying back their rearing costs and generating serious profit. Finding that over half of our culled cows are from this prime age group was a wake-up call. It proves that the problem isn't "old" cows wearing out. The problem is that cows in their prime are breaking down due to health issues, meaning we are losing our best assets just as they become most profitable.
By Parity (Lactation Number)
When we look at culling by lactation number, the story becomes even clearer. The highest rate of culling happens in the third parity (3rd lactation), accounting for 55.1% of culled cows. This is ironic because the third to fifth lactations are typically a cow's most productive years. So, why are we losing them? It shows that the culling decision is not just about milk volume. A manager is looking at a cow that should be a superstar but is instead struggling with recurring mastitis, lameness, or can't get pregnant. At that point, her health problems outweigh her production value, and the difficult decision to cull is made.
By Days in Milk (DIM)
Looking at when during lactation cows are culled, we see another trend. The largest group of cows is culled in the middle of their lactation, between 121 and 180 days in milk (43.0%). This is after their peak production phase. It suggests that cows are hitting their peak, but their bodies can't sustain the effort. They start to develop health problems as the lactation goes on, and by mid-lactation, the problems become too severe to manage. The data also showed that the average parity for culled cows was around 3, regardless of the days in milk. This confirms that the third lactation is a critical make-or-break point for herd longevity.
How Can You Reduce Involuntary Culling on Your Farm?
Involuntary culling can feel random and out of your control. But the truth is, most of the diseases that force culling are linked directly to the farm's environment and daily management routines.
You can significantly reduce involuntary culling by focusing on prevention. This means investing in better cow comfort, upgrading your milking equipment, keeping the barn environment clean and dry, and ensuring excellent nutrition and water access. Small changes in these areas have a huge impact on cow health.
The key is to connect the diseases back to their root causes. It’s not enough to just treat a sick cow; we need to ask why she got sick in the first place. I’ve visited hundreds of farms, and the most profitable ones are obsessed with prevention. They tackle the problems before they start. By improving the cow’s daily living conditions, you directly lower the stress and health challenges she faces. This proactive approach is the most effective way to reduce forced culls and keep healthy, productive cows in your herd for longer.
Here’s how you can connect common culling reasons to specific management and equipment solutions:
| Disease Problem | Common Cause | Equipment & Management Solution |
|---|---|---|
| Udder Diseases | Faulty milking equipment, poor hygiene, incomplete milk-out. | A modern Milking Parlor with well-maintained Components is crucial. Ensure Liners & Tubes are replaced regularly to prevent bacterial spread and ensure gentle milking. |
| Hoof & Leg Diseases | Wet floors, standing too long on concrete, uncomfortable stalls. | Improve Cow Comfort. Install automatic Manure Scrapers to keep alleys clean and dry. Provide comfortable Cow Free Stalls with soft Cow Mattresses to encourage lying down. |
| Reproductive Issues | Poor health and development as a calf, stress. | A healthy start is key. Use dedicated Calf Rearing Equipment to protect young animals from disease and ensure they grow into strong, fertile heifers. |
| Digestive & Respiratory Issues | Heat stress, poor air quality, dirty or insufficient water. | Control the Environment. Install high-volume Barn Fans for ventilation and cooling. Provide constant access to clean water with large-capacity SS Troughs. |
Conclusion
Culling is part of dairy farming, but involuntary culling doesn't have to be. By focusing on prevention through better management and equipment, you can keep cows healthy and productive for longer.
References & Credits
Yang, Q., Zhu, Y. D., Liu, X. W., et al. (2025). Analysis and Suggestions on Culling Reasons for Dairy Cows in Hebei Province. China Dairy Cattle, (03), 25-31.
Source Information:
- Original Publication: China Dairy Cattle, Issue 3, 2025.
- Reprint Credit: Originally sourced from the China Dairy Cattle official media platform (March 2025).
This article was adapted and translated into English for educational purposes based on the research findings of the authors listed above.
