As the UK experiences increasingly warm summers, livestock producers are being reminded of the dangers of heat stress in calves, particularly those in housed or semi-housed environments. We ask that all farmers to take proactive steps to protect their youngstock from rising temperatures and humidity levels.
What is Heat Stress in Calves?
Heat stress occurs when a calf’s body temperature rises beyond its comfort zone and it struggles to cool down effectively. This can lead to reduced feed intake, slower growth rates, compromised immunity, and—in severe cases—death.
Warning Signs
Signs of heat stress in calves include:
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Panting or rapid breathing
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Lethargy or decreased activity
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Reduced milk or concentrate intake
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Increased water consumption
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Standing rather than lying down
MQ Top Tips to Prevent Heat Stress
To help producers safeguard their calves this summer, Meadow Quality recommends the following practical measures:
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Ad lib clean drinking water
Always provide unrestricted access to fresh, clean water. Hydration is the first line of defence against overheating. -
Clean dry beds will reduce humidity
Damp bedding can significantly increase humidity levels, making calves more susceptible to heat stress. Replace wet bedding frequently and ensure good drainage. -
Create shading from the intense sunlight
Use shade cloths, open-sided shelters, or trees where possible. Avoid tin roofing sheets where practical, as they radiate heat and worsen conditions underneath. -
Use fans where possible to keep air moving
Air circulation is key. Use fans to increase airflow, but be careful to position them so that calves aren’t in direct contact with the blast of air, which can cause chills or respiratory issues.
Take Action Early
Call you field officer for advice on calf management or reach out to your vet if calves begin to show concerning behaviours.
OR for more information on calf welfare and management, head to the AHDB website Calves in hot weather | AHDB
