You've invested in your cows' comfort and performance. Is heat stress preventing you from getting the full benefit?
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Think about everything you've invested in your dairy. Comfortable stalls and bedding, quality feed, a TMR mixer, genetics, nutrition, and herd management. Every investment is intended to help your cows stay healthy, comfortable, and productive. But what happens when those cows get too hot? A cow struggling to release heat may spend more time standing and panting instead of lying comfortably in the stall you've provided. She may also eat less of the carefully balanced ration you've invested so much time and money in preparing.
You can do everything right, but if your cows can't get rid of the heat they're producing, you may not be getting the full return on those investments. That's why cooling deserves the same attention you give to feed quality, stall comfort, and herd health.
You've probably already invested in ventilation and cooling equipment, but when was the last time you checked how well it's actually performing? Fans wear, barn layouts change, stocking densities increase, and management practices evolve. A ventilation and cooling assessment can help identify potential problems, opportunities to improve performance, and areas where you're already doing things well. And you can do much of the detective work yourself.
1. Follow the airflow
Here's an interesting experiment. You can purchase a basic handheld wind-speed meter, called an anemometer, on Amazon for under $50. Take it into your barn and measure the airspeed at cow level in several stalls, including locations close to the fans, between fans, and farther down the barn. Check the feed bunk and other areas where your cows spend time, too. You may be surprised by how much the readings vary from one location to another.
At Core Cool Systems, our design target is at least approximately 4.3 mph (7 km/h or 1.94 m/s) at cow level in the resting areas. It's a useful reference point, although airspeed alone doesn't determine whether a cow is receiving adequate cooling. Make a simple drawing of your barn, mark your measurement locations, and record the results. You'll have a much better picture of where airflow is strongest, where it drops off, and which areas might deserve a closer look.
2. Follow the water
If you're using sprinklers, soakers, or misters, it's worth investigating how much water your system consumes and where that water ends up. Is the water helping cool your cows effectively, or are you dealing with wet bedding, runoff, and additional manure-handling costs? Effective evaporative cooling depends on the relationship between water application, airflow, temperature, and humidity. Using more water doesn't automatically mean better cooling, particularly if the moisture isn't evaporating as intended.
In fact, adding more water without adequate airflow and air exchange can increase humidity inside the barn, making it harder for cows to release heat. That's why it's important to look at how your water and ventilation systems work together, rather than assuming that more water means more cooling.
Consider how your water and ventilation systems work together, whether their operating schedules make sense, and whether you're achieving the cooling results you expect for the water you're using.
3. Watch the cows
Your cows can tell you a great deal about their environment if you take the time to observe their behavior. Are they lying comfortably during hot weather, or spending more time standing? Do they bunch together in particular areas of the barn, avoid certain stalls, or continue breathing heavily into the evening after outdoor temperatures have dropped?
Think about the different environments your cows experience throughout the day, particularly in the holding area, at the feed bunk, and in the resting areas. These behaviors can have several causes, but they're useful clues when evaluating cow comfort and identifying where cooling might need attention. If you're already collecting lying time, rumination, respiration rate, or core body temperature data, compare those records with what you're observing in the barn.
4. Check the equipment and controls
When were your fans last cleaned or serviced, and are the belts, bearings, motors, and nozzles in good condition? Consider how your fans and water systems operate together and how they respond to changing weather conditions. Do the controls automatically adjust to temperature and humidity, or does someone manually switch equipment on and off?
Electricity, water, maintenance, and repairs all contribute to the cost of cooling your cows. If equipment is running harder than necessary during cooler periods, or if fans aren't delivering the airflow they should, there may be opportunities to improve efficiency. Sometimes adjusting or maintaining the equipment you already own is a better investment than purchasing something new.
5. Look at your herd records
This may be the most financially important part of your assessment. Compare summer performance with cooler periods and look for changes in milk production, components, feed intake, reproduction, and cow health. While many factors influence herd performance, consistent seasonal patterns can help identify areas worth investigating.
Consider a 310-cow dairy averaging 90 pounds of milk per cow per day. That's 27,900 pounds of milk daily.
At a milk price of $17 per hundredweight, here's what a summer production decline could mean:
5% production loss: 1,395 pounds per day, representing $237.15 in lost gross milk revenue daily, or $21,343 over 90 days.
10% production loss: 2,790 pounds per day, representing $474.30 in lost gross milk revenue daily, or $42,687 over 90 days.
Not every summer production decline is caused by heat stress, and improving cooling won't necessarily prevent every lost pound. But when you consider that heat stress can also affect reproduction, cow health, and feed intake, it's worth investigating how much your current cooling program could be costing your operation.
Reproduction deserves attention as well. Heat stress can reduce conception rates, and the financial consequences of delayed pregnancies can extend well beyond the summer months. Looking at production, reproduction, and cow comfort together provides a more useful picture than evaluating any one measurement on its own.
6. Decide what you want to improve
Every dairy is different, and your barn design, herd size, climate, existing equipment, and management practices all influence what makes sense for your operation. Perhaps you're concerned about summer milk production, reproductive performance, or cows spending too much time standing. Maybe you're looking for ways to reduce electricity use, water consumption, or maintenance costs, or perhaps you'd simply like to confirm that your current cooling system is performing as expected.
Knowing what you want to accomplish makes it easier to evaluate your options and determine whether changes are worth the investment. An assessment doesn't automatically mean you need more equipment. It gives you information to help decide what, if anything, needs attention.
Ready to do a little detective work?
We've developed a free Cooling Performance Self-Assessment to help you investigate what's happening in your own barn. It includes a barn drawing grid, space to record cow-level airspeed measurements, and practical questions about your cooling equipment, water use, cow behavior, and herd performance. You don't need to be shopping for a new cooling system to find it useful; the objective is to better understand what your existing system is accomplishing.
DOWNLOAD YOUR FREE INTERNATIONAL COOLING PERFORMANCE SELF-ASSESSMENT
DOWNLOAD YOUR FREE USA COOLING PERFORMANCE SELF-ASSESSMENT
Complete it on your computer or print it and fill it out by hand. Send your completed assessment to info@corecoolsystems.com for review.
What did you discover?
Let's put that information to work.
You've taken the time to look at your cooling system, measure airflow, observe your cows, and consider what heat stress may be costing your dairy. Now let's find out whether there are opportunities to improve your cooling performance.
Send your completed Cooling Performance Self-Assessment and barn drawing to info@corecoolsystems.com. Include your farm location and the best way to contact you.
Here's what happens next:
We'll review your findings and contact you to discuss your existing cooling system, your concerns, and what you'd like to improve.
We'll determine the next step for your farm. Where we have a CCS representative nearby, we can arrange an on-farm assessment. Otherwise, we'll work with you remotely to identify any additional information needed.
We'll help you evaluate a solution. If Core Cool Systems looks like a good fit, we can develop a proposed cooling layout and quotation for your operation.
You may discover that your existing system needs adjustments, or that a different approach to cooling could provide meaningful benefits. Either way, you'll have better information to make an investment decision.
Ready to find out what Core Cool Systems could do for your dairy?
Email info@corecoolsystems.com to take the next step toward a cooling solution designed for your cows and your operation.
Core Cool Systems — Cool the Cow. Not the Barn.
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