‘Heat stroke’ is one of the forms of ‘stress’ caused by the environment that leads to great economic losses to industrial chicken farms in tropical countries in general and in Vietnam in particular. ‘Heat stroke’ changes physiological functions of chickens, increases oxidative stress, imbalances the buffer system, weakens the immune system and intestinal health; which increases mortality rate, reduces feed intake, reduces weight gain, increases feed efficiency, thereby significantly reducing profits of farmers (Lara et al., 2013; Kumari et al., 2018; Goo et al., 2019)
Effects of tropical heat stroke on commercial broiler productivity.