A method in which broiler chickensChickens kept for meat production. Fast growing breeds can reach a weight of over 2 kg at 5 weeks of... are subjected to high ambient temperature at an early age of life to reinforce resistance of broiler chickensChickens kept for meat production. Fast growing breeds can reach a weight of over 2 kg at 5 weeks of... to heat stressA condition when animals do not have the ability to withstand high ambient temperatures especially w... later in life.