Thermoregulation in sheep and the role of water temperature in hot climates

Sheep meat and wool production are undertaken in many regions of the world and in climates ranging from very cold (below 0°C) to very hot (over 45°C). In cases such as the export of sheep from Australia to the Middle East region, the relatively rapid change in environmental conditions may result in signs of heat stress in sheep. While some aspects of the heat stress response in sheep have been well studied, this review identifies a lack of research relating to the role of water temperature in heat stress management. This review presents evidence that indicates that water temperature plays an important role in heat stress. In hot conditions, sheep prefer hot water and drink more as water temperature increases.