Heng-Wei Cheng

IntroductionDuring summer, high ambient temperature is one of the most important environmental stressors adversely affecting poultry health [1–2]. Hens to loss heat are limited due to feathering and the absence of sweat glands [1]. A hen can tolerate and adapt to ambient temperatures up to 25°C (77°F); temperatures above this level can lead to heat stress (HS) as a combination o ...