Understanding the causes of heat stress in grower-finisher pigs
When ambient temperature exceeds the thermal comfort zones of grower-finisher pigs, they experience heat stress, which negatively affects well-being and production. Heat stress results from a negative balance between the net amount of energy flowing from the animal to its environment and the amount of heat energy produced by the animal. As a result of heat stress, grower-finisher pigs will significantly reduce their feed intake and be unable to reach optimal growth.
How to recognise
Signs of heat stress include a drop in feed intake combined with extended periods of elevated ambient temperatures in the grower-finisher units. High humidity can worsen the condition.
The impact on the farmer
Heat stress negatively affects the feed intake of grower-finisher pigs, making them more susceptible to disease and reducing their growth performance. This ultimately results in increased production costs.
To ensure the swine’s health and performance, optimum ambient temperature levels should be respected; effective management of feed and water can help alleviate the negative effects of heat stress.