Alert Prepare to take necessary cooling measures; increase ventilation rate; turn on cooling fans where applicable; monitor animal behavior for signs of heat stress such as panting or open mouth; make plenty of drinking water available. - See more at: file:///C:/Users/Nutthapon/Desktop/Heat%20Stress%20Index%20Chart%20for%20Swine%20Producers%20-%20The%20Pig%20Site.html#sthash.VDGfE3Ve.dpuf