n recent decades there has been a growing concern about animal stress on intensive pig farms due to the undesirable consequences that stress produces in the normal physiology of pigs and its effects on their welfare and general productive performance. This review analyses the most important types of stress (social, environmental, metabolic, immunological and due to human handling), and their biological consequences for pigs.
Pigs are sensitive to heat. During the finishing period, their comfort temperature has been evaluated at 22°C. Above 25°C, they suffer from heat stress and their body and eating behavior adapt to evacuate the heat generated by metabolic processes in their hot environment (Renaudeau et al., 2011).