Birds should not be exposed to direct sunlight or hot and humid air long enough to cause heat stress. An indicator of this is the appearance of shortness of breath. Rearing conditions affect the ability of birds to maintain their body temperature within certain limits, but this ability can be impaired if the birds are exposed to high humidity. Adequate ventilation must be provided to protect birds from overheating in any climate change. Particular attention should be paid to the distribution of air, especially at the level of birds. Spectators must plan in advance to protect birds from heat stress. During the summer months, it is desirable to reduce the stocking density of day-old chicks. If, however, there are signs of heat stress and mortality, the caretaker must determine the specific cause – whether the design of the building is appropriate, the location, the predicted maximum temperature or humidity.
In hot and humid weather, birds should be inspected more frequently. Measures must be taken to reduce the possibility of heat stress by increasing ventilation, especially at the level of birds. It is desirable to provide portable fans if necessary. The air temperature can be lowered by placing a good one wall and roof insulation. The heat production of birds can be adjusted, by reducing density and changing the diet.