Keeping pigs cool in the summer

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Editor’s note: The following was written by Ashley Englin, Iowa State University Extension swine field specialist, for the Extension Clippings news release.

When temperatures climb in the summer, pigs, like people, can feel the heat.

But pigs cannot sweat like we do. That is why farmers take extra steps to keep them cool, safe and comfortable all season long.

Pigs rely on special care to manage their body temperature. They pant, lie on cool surfaces or use water misters to stay comfortable. Without help, heat stress can affect their health, growth and well-being. That is why the swine industry takes hot weather seriously.

According to Iowa State University, heat stress in pigs can cost the industry hundreds of millions of dollars annually. But more importantly, it can impact animal welfare. That is why farmers and swine professionals take proactive measures, including:

Pigs always have access to fresh drinking water. Farmers check that the water pressure and flow are exactly right for pigs at every stage of growth.
Barns are equipped with fans, vents and sometimes stir fans to keep air moving. Removing dust or obstructions helps keep airflow strong, reducing barn temperatures.
Many barns use evaporative coolers, like misters or cool pads, to lower indoor temperatures by up to 15 degrees. These systems are regularly checked to ensure they are running effectively.
When it is hot, pigs often eat less. To support them, adjust feed formulas by adding energy-rich ingredients and reducing fiber. It may also help to add vitamins and electrolytes.
Watch pigs closely for signs of discomfort, like rapid breathing or crowding near waterers. Spotting these signs early helps prevent bigger problems.