04/27/2026
☀️ Prepare for Warmer Days Ahead: Protecting Your Calves from Heat Stress ☀️
As the temperatures begin to climb, it is important to remember that our youngest herd members are also the most vulnerable. Unlike mature cows, young calves have an underdeveloped ability to regulate their own body temperature. With a limited capacity to sweat and a high surface-area-to-body-mass ratio, they can quickly shift from mild discomfort to severe physiological strain.
It’s Not Just the Heat—It’s the Humidity
To accurately measure risk, we look at the Temperature-Humidity Index (THI). Because calves rely on respiratory evaporation to cool down, high humidity makes it much harder for them to shed heat. While many producers wait for the "dog days" of summer to take action, research shows that calves actually begin to experience heat stress at a THI as low as 65–69. This means even a moderate day with high humidity can put your calves at risk!
The Hidden Impact: Gut Health & Immunity
Heat stress does more than just make a calf pant; it causes a "silent" internal crisis. To stay cool, a calf redirects blood flow away from the digestive tract and toward the skin. This starves the intestinal lining of oxygen, weakening the gut barrier and making the calf more susceptible to pathogens and inflammation.
When a calf’s body is busy fighting heat and gut stress, it diverts energy away from growth. The result? Lower feed efficiency, stalled weight gain, and a compromised immune system.
Proactive Strategies for Summer Success
To keep your calves on track for their performance goals, a proactive heat-abatement program is essential. We recommend a multi-layered approach:
✅ Prioritize Airflow: Increasing ventilation through fans or mechanical systems is one of the most effective ways to lower re**al temperatures and respiration rates.
✅ Provide Shade: Solar radiation can make hutches much hotter than the ambient air. Ensure calves have access to shaded, well-ventilated areas.
✅ Unlimited Clean Water: Water consumption spikes during heat stress. Ensure water is always fresh, clean, and easily accessible.
✅ Maintain Hygiene: Keep bedding dry and pens clean to minimize disease pressure while the immune system is under stress.
✅ Close Observation: Monitor milk and starter intake closely. A drop in appetite is often the first sign that heat is taking a toll.
By protecting the gut and preserving energy for growth today, you are ensuring the long-term health and performance of your future herd.
Interested in learning more? Contact our Customer Service today to be put in touch with a representative in your area!!
How are you preparing your barn for the upcoming heat? Share your tips below! 👇
