CowManager research continues to show that early mastitis detection is one of the top priorities for dairy producers around the world. Producers recognize the significant long-term impact mastitis can have on a cow’s lifetime milk production, making investment in early detection and timely intervention especially valuable.

Early Mastitis Warnings

Built from a deep understanding of how dairy farms operate every day, the new Milk Sensor technology delivers precise, real-time insights at both the cow and parlor level. The system monitors individual cows per quarter liner, providing early mastitis detection while also evaluating milking equipment and milker performance for quality and efficiency.

The system will measure conductivity, vacuum, temperature, milk production, and milk flow just a few inches below each teat, providing highly accurate early warnings for mastitis and information about milk quality. This level of precision unlocks a powerful new layer of actionable insights.

Early warnings are clearly communicated through a flashing light on the transparent sensor, via automated voice, on the screen in the parlor, or on the app.

Monitoring the Milking Parlor

The Milk Sensor also helps uncover irregularities in the milking parlor that often go unnoticed, even in modern systems. Issues such as vacuum drops, overmilking, and improperly cleaned units can negatively impact milk quality and cow health.

The system provides real-time alerts for suboptimal milking parlor performance, along with valuable insights into milking quality and efficiency. This enables producers to take timely corrective action before small irregularities turn into major herd health problems or costly downtime.

Expanding the CowManager Platform

The Milk Sensor further strengthens CowManager’s connected herd management platform by combining these new insights with existing real-time monitoring for health, fertility, nutrition, transition, and youngstock.

Together with technologies such as the CowManager Sort Gate and cow locating tools, the system allows producers to manage proactively, improve animal health, and keep daily operations running with greater confidence, efficiency and profitability.

“At CowManager, innovation starts with understanding what producers truly need on the farm,” says Gerard Griffioen, founder of CowManager.

“We work closely with dairy producers around the world every day, and that perspective continues to shape what we build. Our goal is not simply to add more technology, but to develop solutions that move dairy operations forward. Our new Milk Sensor, provides producers greater control over herd performance and daily operations. The results we are already seeing from early on-farm trials confirm the significant impact of this technology.”

Mastitis and Parlor

CowManager is introducing the Milk Sensor with two monitoring solutions: Mastitis and Parlor. The company plans to expand the platform with additional solutions built on the same sensor technology, creating even more opportunities for producers to strengthen herd performance and daily farm management.

The Milk Sensor is designed for simple installation and ease of use, featuring a wireless, low-maintenance setup compatible with a wide range of parlor brands. CowManager will officially introduce the system later in 2026, with wider-scale availability planned for 2027.

Questions?

• Media Contact: CowManager
• Joanna Frankenberg, Area Marketing Manager USA
• Email: j.frankenberg@cowmanager.com

CowManager’s Gerard Griffioen and Koen van Meurs with the Milk Sensor.

“Thanks to the Milk Sensor, farmers can stay one step ahead of udder health issues,” says Gerard Griffioen, dairy farmer and founder of CowManager. Mastitis not only affects milk production and animal health, it also affects profit. That is why preventing it is vital.

“When I was visiting one of our customers who milks about 125,000 cows, I saw his struggle with mastitis and the accuracy of his milk data. Cows were left unidentified and for them, no milk production data was available. And at the same time there was a wealth of data from other cows – but unreliable,” Griffioen recalls.

That’s how the idea for the Milk Sensor came about.

“Our Milk Sensor was developed in collaboration with dairy farmers,” says Koen van Meurs, Head of Product Development, enthusiastically.

Because the Milk Sensor measures at the teat level and CowManager has an extensive global network of large-scale dairy farms, a significant amount of data has been collected in a short amount of time.

Comparing our results with milk analyses from the lab was a big part of the development process and vital for ensuring maximum reliability. Artificial Intelligence, in combination with CowManager’s many years of experience with algorithms and large-scale data, resulted in a smart, advanced and reliable dashboard.

Five indicators in one Milk Sensor

The Milk Sensor currently has five indicators: temperature, conductivity, milk volume, milk flow and the vacuum level.

“The Milk Sensor is positioned very close to the udder to ensure reliable data. Milk quality has also been taken into account: the sensor ensures a clean, unobstructed milk flow. The system can be fully customized. Installation is quick and easy: cut the tube beneath the milk cup, slide the transparent sensor into place and reattach the tubes on either side of the sensor. This works with virtually any brand and type of milk cup in the milking parlor,” Gerard explains.

All data computer. CowManager’s Milk Sensor is available to all dairy farmers who have a CowManager ear sensor or who wish to purchase one. In the future, the Milk Sensor can also be upgraded with cow identification.

Left: CowManager Milk Sensor. Right: The Milk Sensor in action during milking.

Early detection and prediction of mastitis

Helping to detect and even predict mastitis is one of the Milk Sensor’s main features. Continuous monitoring of milking parlor performance has a positive effect on teat health and can prevent risk factors for mastitis such as teat tip calluses.

The Milk Sensor can also play a key role in producing milk with a low somatic cell count. Gerard and Koen are looking even further ahead.

“This preventive approach has a positive impact on animal welfare. It will help reduce culling due to high cell counts or mastitis problems,” the men predict. “This ultimately results in a longer lifespan for the cows,” Gerard explains.

Performance of each unit at a glance

Another main feature of the Milk Sensor is to analyze milking parlor performance down to the level of individual milk cups.

“The proper functioning of a milking parlor is essential for preventing udder problems. Blind milking, air in the milk or a low flushing temperature aren’t visible, but they can pose a huge risk when it comes to mastitis or a high bacterial count,” Koen explains.

The Milk Sensor monitors this and helps detect mastitis. The Milk Sensor also ensures continuity throughout the milking process when multiple milkers are involved. Any differences between milkers or milking sessions will immediately become visible.

“The combination of the ear and Milk Sensor and the accompanying sorting gate offers unprecedented possibilities,” says Gerard about the entire CowManager ecosystem. The Milk Sensor is a key component of the overall package.

But, according to Koen and Gerard, that’s not all. “This is just the first step. Eventually, the Milk Sensor will be able to measure even more parameters in both the milk and the milking parlor,” Koen reveals.

What Makes DA Hard to Spot

A displaced abomasum occurs after a period of subtle changes at first. Affected cows may eat less, ruminate less, and produce less milk.

An abomasum is not easily visible on external examination. Only trained veterinarians are usually able to detect it. You can recognize displaced abomasum using several clinical indicators, such as:

• An increased heart rate
• Cold ears
• Poor rumen fill
• Loose or watery manure
• An abnormal ‘ping’ when you tap the abdomen
• Positive fluid-splashing sounds

DA often appears within less than 30 DIM, when cows are already under metabolic stress and your team’s focus is split among fresh cow checks, feeding, and milking routines.

A displaced abomasum doesn’t occur spontaneously. Often a cow first shows other signs, like an infection.

That’s where technology makes the difference.

How Continuous Monitoring Changes the Game

CowManager’s Health solution turns early detection from guesswork into data-driven insight. Instead of waiting for visible symptoms, the system continuously tracks eating, rumination, and activity patterns. These behavioral indicators are the first to change when a cow’s abomasum begins to displace.

Both ketosis (decreased appetite, lower milk production) and a displaced abomasum can have similar early signs, and it is common for a cow to have both conditions simultaneously.

During ketosis, a slight and gradual decline in rumination and feeding activity is typically observed. In contrast, a displaced abomasum is characterized by a sudden and marked reduction in both parameters.

Spotting Those Early Warning Signs

For example, a healthy fresh cow should steadily increase her eating time after calving. If the Health solution shows a consistent drop instead, it’s an early warning sign.

The same goes for rumination — one of the most reliable indicators of digestive comfort. A sudden decline can point to displaced abomasum or related metabolic issues such as ketosis.

CowManager’s real-time alerts help you act fast and prevent health issues before they escalate. Instead of reacting to DA cases after production loss or veterinary treatment, you can intervene at the first signs of trouble — saving time, money, and improving animal welfare.

Support Your Transition Cows Proactively

A good dry period is crucial for preventing health abnormalities under 30 DIM. Rumen fill should remain at an adequate level throughout the dry period, to avoid pre-partum ketosis and lower feed intake postpartum.

Most displaced abomasum cases occur around calving, when a cow’s energy balance shifts dramatically. CowManager’s Transition solution complements the Health solution by helping you manage this critical period more effectively.

It monitors each cow’s recovery after calving, showing whether she’s adapting well or struggling with feed intake. That makes it easier to fine-tune nutrition, adjust management for high-risk cows, and prevent metabolic problems before they cascade into a DA case.

The Nutrition solution sends an alert whenever a decline in both rumination and eating time for dry cows is detected, which gives users a chance to adjust management to avoid low feed intakes. This has huge impact on a cow’s welfare during dry period and postpartum.

When you can see how each cow transitions in real time, your team doesn’t have to rely solely on daily pen checks or milk data. You get a complete picture of her health and recovery — exactly when it matters most.

Detect, Act and Prevent

Displaced abomasum doesn’t have to be a production-draining surprise. With CowManager’s Health, Transition and Nutrition solutions you gain early, actionable insights into every cow’s health status.

Parameters like low feed intake and transition alerts give you the opportunity to dive deeper in dry cow management. That means fewer missed cases, faster interventions, and a smoother transition period for your herd.

Healthy cows produce more milk, breed back faster, and stay in the herd longer. Preventing DA isn’t just about treating disease — it’s about protecting performance.

CowManager can help you detect cow diseases so you can act early – keeping your herd healthy and your performance high.

Daystar Dairy: Driving Efficiency Through Data

Owned and operated by Dave and Sara Jane Brutscher and their sons, Jesse and Paul, Daystar Dairy is an 800-cow Holstein herd. After nearly a decade with CowManager, the family has benefited by integrating data into their daily decision-making process. They emphasized that the cow monitoring system helps guide breeding, culling, feeding and herd health protocols.

Their goals when implementing the cow monitoring system were clear: improve efficiency, strengthen management, and enhance margins. With better visibility into herd health and behavior, they are able to make more informed, timely decisions that support those objectives.

Pleasant Dutch Dairy: Maximizing Labor

At Pleasant Dutch Dairy, the family partnership is led by John and Linda Vande Weerd along with their sons Alan, Mike, and Nick. They manage 2,500 cows across three sites. After implementing CowManager almost a year ago, the team quickly began leveraging its insights to improve both herd care and labor efficiency.

By reviewing daily data and responding quickly to health alerts, they can address issues earlier—often before visible symptoms appear. The ability to customize alerts based on their own farm data allows them to fine-tune their approach, helping reduce disease incidence and culling rates while making better use of employee time and expertise.

Valadao Dairy: From Heat Detection to Health Gains

Eduardo and Maria Valadao, along with their son Mike, operate a 2,100-cow Holstein herd. They initially adopted CowManager for heat detection, but soon realized broader benefits as they became more familiar with the system.

Today, they are able to identify cows at risk of health issues, such as clinical mastitis, before symptoms appear. The cow monitoring system’s impact has been significant, including improved fertility and a reduction in culling rates from 6.5% to 3.8%. Mike also credits CowManager with helping them through an HPAI (Bird flu) event, allowing them to intervene sooner and monitor recovery.

Shared Results Across Diverse Operations

Despite differences in herd size, management style, and length of use, all three dairies report similar advantages from using CowManager:

• Earlier detection of subclinical health issues
• Improved fertility and heat detection
• Reduced culling rates
• Faster cow identification and sorting
• Actionable, real-time herd insights

Technology that Supports – Not Replaces – Good Management

While each producer emphasized the value of CowManager, they also noted that technology is not a replacement for skilled employees or sound management practices. Instead, it serves as a powerful tool to enhance both.

They also stressed the importance of evaluating any new technology to ensure it delivers measurable value and supports overall operational goals. For these three operations, CowManager has proven to be more than just a monitoring system—it’s a decision-making tool that supports healthier cows, more efficient teams, and stronger financial performance.

Hoard’s Dairyman

A longer version of this article has previously been published by Hoard’s Dairyman.

Year one with CowManager is often about trust. Year two is about unlocking potential.

Once CowManager is installed, producers spend the first several months learning the alerts, understanding the technology, and building confidence in the system. The CowManager ear sensors measure behavior and temperature. Based on this data, both individual and group alerts are calculated.

The dashboard is an easy-to-use visual representation of real-time data, designed to simplify daily routines. All relevant alerts and insights are displayed in one place through various widgets. The onboarding process ensures producers know how to respond to alerts and leverage the basics.

Year two is where proactive management, integration with farm management software, and team consistency turn insights into measurable impact. Here’s how top dairies make that shift.

Moving beyond basics: integrating farm management software

After year one, the real value emerges when integration deepens between CowManager and on-farm systems, including farm management software. These integrations increase efficiency by reducing double entry and streamlining workflows.

For example, CowManager integrates with herd management and farm management software to synchronize cow data and monitor compliance more effectively, ensuring farm protocols are consistently followed. When pregnancy check results are integrated into herd-management software, it becomes easier to identify discrepancies in protocol execution.

The level of impact depends on herd size and management style, but nearly every dairy can unlock value by advancing these integrations.

The overlooked details

Compliance is not just about following protocols, it is about protecting profitability. Too often, basic compliance such as tag maintenance gets overlooked. Low batteries on multiple tags can compromise accuracy and trust in the system, no different than missing steps in a breeding protocol.

Consider this: What if an employee skipped part of the Ovsynch sequence? Breeding effectiveness would plummet, leading to more days open, lower conception rates, and ultimately higher costs. By monitoring alerts and compliance through CowManager, these breakdowns can be caught early.

Breeding and reproduction strategy with data and farm management software

CowManager data allows tracking of historic heats and real-time compliance. When combined with farm management software, this data becomes even more valuable for decision-making.

For example, if three open cows showed heat alerts but were not inseminated before the next vet check, how would that affect palpation rates? If heat alerts were correlated with insemination records in farm management software, how many days open could be saved? These “what if” analyses highlight not only the cost of inaction but the profitability of improved compliance.

Producers should ensure optimal utilization of Fertility Insights by reviewing management settings within the CowManager web application. Parameters such as average cycle lengths, deviations from norms, and voluntary waiting periods can be customized to align with specific herd requirements.

Health and transition management

The same concept applies to health. What if a review of cows that were sold or died, using insights from CowManager and farm management software, revealed missed sick alerts? What if transition cows were managed by listening to eating minutes instead of relying solely on pen moves?

With CowManager, producers can “listen to the cows.” For example, eating-time data in the fresh pen can identify at-risk animals before visible symptoms. These proactive shifts can reduce treatment costs, improve survival, and shorten recovery times.

Tools within CowManager help detect transition diseases such as ketosis and mastitis up to 50 days before calving. This simplifies transition management, especially when symptoms are difficult to detect naturally. With 75% of adult-cow diseases occurring in the first 30 days after calving, early intervention makes a significant difference.

Symptoms of ketosis, such as loss of appetite, weight loss, and sweet-smelling breath, are difficult to detect early without monitoring. Likewise, early signs of mastitis, including swelling, heat, or hardness in the udder, are easily missed, especially in large herds. Mastitis severely affects milk production, making early identification critical to both animal health and business performance.

Team approach to success

The dairies that have the most success with CowManager use it as part of a broader team strategy, often alongside farm management software. Consultants, veterinarians, and nutritionists are brought into the data conversation.

After year one, involving this advisory team becomes even more valuable. Together, they shape protocols, adapt management practices, and find new efficiencies that drive profitability.

The difference between “working” and “winning” often lies in consistency. Employees must interpret alerts the same way every time. Multiview enables consultants, veterinarians, and nutritionists to participate, turning individual data points into shared strategies.

Simple SOPs for common alerts ensure that whether it is heat detection or a sick-cow alert, everyone knows the next step.

Looking deeper: connecting data, genetics, and performance

CowManager also offers opportunities to connect cow data with genetics. By analyzing how specific genetic indexes correlate with health alerts, alongside data from farm management software, producers can identify traits linked to stronger performance.

This influences both current herd decisions and future breeding strategies.

Year one establishes trust in CowManager. Year two is where real potential is unlocked through integration, compliance, data-driven protocols, and team collaboration. By moving from reactive to proactive management, dairies shift from simply using alerts to truly transforming herd performance.

CowManager works. The question is: Are you using it to its full potential?

Talk with your CentralStar team about CowManager and how to unlock its full potential.

Author: Jared Krull, Vice President of Sales & Service, CowManager North America

Temperature as Health Indicator

Temperature is one of the most widely recognized indicators of health in animals. When a cow experiences stress, illness, or metabolic challenges, changes in a cow’s body temperature may occur as part of the body’s natural response. The ear is one of the first places in the body where these changes are noticeable.

When a cow’s body temperature rises, it usually means the immune system responds to stress, infection, inflammation, or heat. The body increases temperature to help support immune activity, which can lead to reduced feed intake, lower milk production, and lethargy.

When a cow’s body temperature drops, it often indicates that the cow is struggling to maintain normal body functions. This can happen during severe illnesses, metabolic disorders, or after calving, when blood flow shifts from the cow’s ear toward vital organs and the body tries to conserve energy.

Cow Body Temperature in Dairy Herd Monitoring

Modern cow monitoring systems often track behavioral indicators such as eating behavior, rumination patterns, activity and inactivity.

Adding temperature monitoring, specifically ear temperature, to this data can strengthen the overall understanding of herd health. When producers have access to multiple indicators, they can better interpret what is happening within the herd and respond quickly when conditions change.

For dairy producers managing large herds, it can be difficult to detect subtle health changes through observation alone. Monitoring technologies that track indicators such as activity, rumination, and temperature trends can provide valuable insights that support early intervention.

Cow Ear Temperature

Tracking a cow’s temperature alongside behavioral indicators contributes to a more complete picture of cow health. Continuous monitoring helps producers detect changes sooner and respond more effectively.

The CowManager system measures ear temperature specifically, making cow monitoring much more accurate and actionable with early alerts.

Whenever a cow develops an infection, blood flow in the ears shifts toward vital organs. By monitoring ear temperature, this change can be detected early, potentially preventing more serious issues for both you and the cow later on.

Supporting Better Herd Management

Cow monitoring innovations continue to change how dairy farms manage animals. Monitoring technologies allow producers to move from reactive management to proactive herd care.

It may seem tooling makes herd management more complex, but systems that provide reliable data are an important part of driving herd management forward. With real-time data, herd management teams can make more informed decisions about herd health, reproduction, and overall management.