Preventing Heat Stress in Poultry: Practical Strategies to Protect Performance and Profitability
Hot weather can be challenging for poultry producers. When temperatures rise and humidity levels increase, chickens struggle to regulate their body temperature. Unlike humans, chickens do not have sweat glands. Instead, they rely on panting and other behavioural changes to release excess heat. While this helps them cool down, it also increases energy expenditure and can significantly impact flock performance.
Heat stress is one of the leading causes of reduced feed intake, lower growth rates, decreased egg production, poor feed conversion, and increased mortality in poultry production. Fortunately, with the right management practices and nutritional support, producers can minimise these risks and maintain flock productivity during hot periods.
What is Heat Stress in Poultry?
Heat stress occurs when chickens cannot effectively dissipate the heat generated by their metabolism and the surrounding environment. The risk increases when high temperatures are combined with high humidity, poor ventilation, and low air movement.
As temperatures rise, birds require more energy to maintain their body temperature. This energy expenditure diverts resources away from growth, egg production, immunity, and overall performance.
Chickens are very sensitive to high temperatures and their ability to lose body heat is limited by their plumage, high metabolic activity and the absence of sweat glands. Heat stress usually occurs when chickens are exposed to high ambient temperatures and in combination with low air velocity and high relative humidity.
It is the environmental temperature in combination with the humidity level that determines the level of heat stress. See the image below, which shows that a humidity level between 45 and 75 % in combination with a temperature below 30 °C is comfortable for chickens.
Xin, H., & Harmon, J. (1998). Livestock industry facilities and environment: heat stress indices for livestock.
Common Signs of Heat Stress
Chickens will try to re-establish their heat balance with the surrounding by changing their normal behaviour. Recognising heat stress early is essential to avoid production losses.
Signs include:
Panting and rapid breathing
Wings held away from the body
Reduced feed intake
Increased water consumption
Pale combs and wattles
Lethargy and reduced activity
Diarrhoea
Lower egg production
Poor eggshell quality
Sleepiness and lethargy
Try to move away from other chickens
Lift their wings and feathers upright
More napping and less roaming
Increased mortality in severe cases
The Impact of Heat Stress on Poultry Production
Heat stress affects virtually every aspect of poultry performance.
Reduced feed intake
Birds naturally eat less during hot weather to reduce metabolic heat production. Lower feed intake results in reduced nutrient consumption, which negatively affects growth rates, egg production, and feed efficiency.
Impaired feed conversion ratio
Heat stressed birds use more energy for maintenance and cooling their bodies, leaving less energy available for productive purposes. This often results in a poorer feed conversion ratio and higher production costs.
Reduced egg production and eggshell quality
In laying hens, heat stress can disrupt acid base balance due to excessive panting. This affects calcium metabolism and bicarbonate availability, both of which are crucial for eggshell formation.
Increased disease susceptibility
Heat stress places additional strain on the immune system, making poultry more vulnerable to infections and disease challenges.
Practical Strategies to Reduce Heat Stress
Heat stress in chickens can have serious consequences on profit, performance, and production. Various measures can be taken to reduce heat stress in poultry.
Management
Adjust management practices correctly, such as ventilation, stocking density, litter management and more. Design and orientate the farm house to reduce heat stress as much as possible. Insulate the house structure sufficiently to prevent solar heat gain.
Avoid unnecessary activity. The summer heat is stressful enough for the chickens. Make sure you do not disturb the chickens during the hottest time of the day.
Optimise ventilation
Effective ventilation is one of the most important tools for managing heat stress. Adequate air movement helps remove excess heat from the poultry house and improves bird comfort.
Ensure that:
Ventilation systems are functioning correctly
Airflow reaches bird level
Fan capacity matches flock size
Air distribution is uniform throughout the house
Often the heat in the house can be controlled by the airflow. Airflow at chickens level helps to dissipate the heat from the chickens. It is therefore important to increase ventilation to dissipate the heat from the chickens. However, there may be certain situations where ventilation is limited.
Naturally ventilated houses are at risk of heat stress if the air is calm and there are no other fans. Mechanically ventilated houses can also be at risk if the ventilation capacity and air mix are not suitable for the size and number of chickens present.
Manage stocking density
Overcrowding significantly increases heat production and reduces air circulation around birds.
Lower stocking densities can help birds disperse heat more effectively and reduce stress during periods of high temperatures.
Adjust feeding schedules
Birds produce heat during digestion. Feeding during the coolest parts of the day can help reduce heat load.
Many producers achieve positive results by:
Feeding early in the morning
Reducing feed availability during the hottest hours
Providing feed again during the evening or night
Chickens are usually hungriest in the morning and tend to stuff themselves. However, they the become more susceptible to heat stress in the afternoon. A solution may be to withdraw the feed six hours before the afternoon peak, thus reducing the risk of heat stress.
The feed can be reintroduced after the peak temperatures have gone down. The chickens can then eat during the night when cooler temperatures are expected. When lowering the feed line, it is important that the feeders are already full. The lights can be used during the night-time (midnight) to get the chickens to eat.
Depending on how often this feeding method is used, some loss in body weight may be noticed. So only follow this feed method when heat stress temperatures are expected.
Ensure access to cool drinking water
Water consumption may increase two to four times during heat stress.
To encourage water intake:
Provide continuous access to fresh water
Protect tanks and pipelines from direct sunlight
Maintain water temperatures as low as possible
Regularly inspect drinkers to ensure proper functionality
Adequate water space, well-functioning waterers and cool water temperatures will encourage the chickens to drink. Provide sufficient fresh and cool drinking water regularly (around 20°C is ideal). Protect drinking water from direct sunlight to keep it cool: use a roof over the tank and paint the tanks white to get cool drinking water.
Nutritional Support During Heat Stress
Nutritional interventions can help poultry better cope with heat stress and maintain performance.
Supplement electrolytes
Heat stress increases the loss of important minerals such as sodium, potassium, magnesium, phosphorus, and zinc. Electrolyte supplementation helps maintain hydration, acid base balance, and water intake.
Providing electrolytes before and during periods of heat stress can improve bird resilience and reduce performance losses.
An option to reduce heat stress is to add electrolytes to the flock’s drinking water for up to three days. Loss of several minerals including potassium, sodium, phosphorus, magnesium and zinc, is caused by heat stress. To increase water intake, electrolytes can be used. Provide electrolytes prior to the heat stress period
Sodium bicarbonate for laying hens
The excessive panting associated with heat stress can alter the acid base balance in poultry.
Supplementing sodium bicarbonate can help support:
Acid base regulation
Eggshell quality
Egg production during hot periods
For laying hens, the use of sodium bicarbonate in the feed or the use of carbonated water is useful. The acid-balance can be altered in poultry by panting and the release of carbon dioxide due to heat stress. In addition, the available bicarbonate, which is important for eggshell formation, may be altered. By reducing this changes, sodium bicarbonate can be used.
Strengthening Poultry Resilience with Champrix Solutions
While management practices are essential, targeted nutritional support can provide an additional layer of protection against heat stress.
Vitaprix: vitamin and amino acid support during stress
Vitaprix is specifically designed to support poultry during challenging periods such as heat stress.
Benefits of Vitaprix include:
Supports recovery after stress
Helps maintain bird health and vitality
Provides essential vitamins including A, D, E, C and B-complex vitamins
Supplies critical amino acids such as lysine and methionine when feed intake declines
Supports egg production and eggshell quality during periods of heat stress
By helping birds meet their nutritional requirements despite reduced feed consumption, Vitaprix contributes to maintaining productivity and flock performance.
Supplementing drinking water with vitamins (A, D, E, C and B complex) can be effective at tackling heat stress mortality in broilers. In breeding poultry, vitamin C can effectively moderate the decrease in egg production and eggshell quality in laying hens caused by hot temperatures. Vitaprix helps to prevent disease and to recover more quickly after a period of stress. When the chicken’s feed intake is low due to heat stress or other factors, amino acids, such as lysine and methionine are still provided.
Heat-Champ: targeted heat stress management
Heat-Champ is a specialised Champrix solution developed to reduce the negative effects of heat stress in poultry.
Key benefits include:
Supports heat tolerance
Encourages feed intake during hot periods
Improves feed efficiency
Helps reduce mortality
Supports technical performance
Contributes to improved egg production
Helps maintain growth performance
For poultry producers operating in regions with recurring high temperatures, Heat-Champ can be a valuable addition to a comprehensive heat stress management programme.
Heat-Champ reduces/prevents heat stress in poultry and benefits from improved feed intake, improved feed efficiency à reduced feed costs, increased heat resistance, lower mortality, better technical performance, improved egg production and shortening of the finishing period.
Why a Preventive Approach Matters
The economic impact of heat stress can be substantial. Lost growth, poor feed conversion, reduced egg production, lower flock uniformity, and increased mortality all affect profitability.
Successful heat stress management requires a combination of:
✅ Effective ventilation
✅ Good housing design
✅ Correct stocking density
✅ Smart feeding schedules
✅ Continuous cool water supply
✅ Electrolyte support with Heat-Champ
✅ Vitamin supplementation with Vitaprix
✅ Ongoing flock monitoring
By taking a proactive approach, producers can protect flock health while maximising technical and financial performance.
Keep Your Poultry Performing During Hot Weather
Heat stress does not have to limit your production results. With the right management practices and nutritional support, poultry can remain productive, healthy, and resilient throughout the hottest periods of the year.
Ready to Protect Your Flock from Heat Stress?
Do not wait until rising temperatures impact your flock's performance.
Discover how Champrix Heat-Champ and Vitaprix can help maintain performance, improve resilience, and protect profitability during challenging environmental conditions.
👉 Contact Champrix today to discuss the best heat stress strategy for your poultry operation.
Hot weather can be challenging for poultry producers. When temperatures rise and humidity levels increase, chickens struggle to regulate their body temperature. Unlike humans, chickens do not have sweat glands. Instead, they rely on panting and other behavioural changes to release excess heat. While this helps them cool down, it also increases energy expenditure and can significantly impact flock performance.
Heat stress is one of the leading causes of reduced feed intake, lower growth rates, decreased egg production, poor feed conversion, and increased mortality in poultry production. Fortunately, with the right management practices and nutritional support, producers can minimise these risks and maintain flock productivity during hot periods.
What is Heat Stress in Poultry?
Heat stress occurs when chickens cannot effectively dissipate the heat generated by their metabolism and the surrounding environment. The risk increases when high temperatures are combined with high humidity, poor ventilation, and low air movement.
As temperatures rise, birds require more energy to maintain their body temperature. This energy expenditure diverts resources away from growth, egg production, immunity, and overall performance.
Chickens are very sensitive to high temperatures and their ability to lose body heat is limited by their plumage, high metabolic activity and the absence of sweat glands. Heat stress usually occurs when chickens are exposed to high ambient temperatures and in combination with low air velocity and high relative humidity.
It is the environmental temperature in combination with the humidity level that determines the level of heat stress. See the image below, which shows that a humidity level between 45 and 75 % in combination with a temperature below 30 °C is comfortable for chickens.
Xin, H., & Harmon, J. (1998). Livestock industry facilities and environment: heat stress indices for livestock.
Common Signs of Heat Stress
Chickens will try to re-establish their heat balance with the surrounding by changing their normal behaviour. Recognising heat stress early is essential to avoid production losses.
Signs include:
Panting and rapid breathing
Wings held away from the body
Reduced feed intake
Increased water consumption
Pale combs and wattles
Lethargy and reduced activity
Diarrhoea
Lower egg production
Poor eggshell quality
Sleepiness and lethargy
Try to move away from other chickens
Lift their wings and feathers upright
More napping and less roaming
Increased mortality in severe cases
The Impact of Heat Stress on Poultry Production
Heat stress affects virtually every aspect of poultry performance.
Reduced feed intake
Birds naturally eat less during hot weather to reduce metabolic heat production. Lower feed intake results in reduced nutrient consumption, which negatively affects growth rates, egg production, and feed efficiency.
Impaired feed conversion ratio
Heat stressed birds use more energy for maintenance and cooling their bodies, leaving less energy available for productive purposes. This often results in a poorer feed conversion ratio and higher production costs.
Reduced egg production and eggshell quality
In laying hens, heat stress can disrupt acid base balance due to excessive panting. This affects calcium metabolism and bicarbonate availability, both of which are crucial for eggshell formation.
Increased disease susceptibility
Heat stress places additional strain on the immune system, making poultry more vulnerable to infections and disease challenges.
Practical Strategies to Reduce Heat Stress
Heat stress in chickens can have serious consequences on profit, performance, and production. Various measures can be taken to reduce heat stress in poultry.
Management
Adjust management practices correctly, such as ventilation, stocking density, litter management and more. Design and orientate the farm house to reduce heat stress as much as possible. Insulate the house structure sufficiently to prevent solar heat gain.
Avoid unnecessary activity. The summer heat is stressful enough for the chickens. Make sure you do not disturb the chickens during the hottest time of the day.
Optimise ventilation
Effective ventilation is one of the most important tools for managing heat stress. Adequate air movement helps remove excess heat from the poultry house and improves bird comfort.
Ensure that:
Ventilation systems are functioning correctly
Airflow reaches bird level
Fan capacity matches flock size
Air distribution is uniform throughout the house
Often the heat in the house can be controlled by the airflow. Airflow at chickens level helps to dissipate the heat from the chickens. It is therefore important to increase ventilation to dissipate the heat from the chickens. However, there may be certain situations where ventilation is limited.
Naturally ventilated houses are at risk of heat stress if the air is calm and there are no other fans. Mechanically ventilated houses can also be at risk if the ventilation capacity and air mix are not suitable for the size and number of chickens present.
Manage stocking density
Overcrowding significantly increases heat production and reduces air circulation around birds.
Lower stocking densities can help birds disperse heat more effectively and reduce stress during periods of high temperatures.
Adjust feeding schedules
Birds produce heat during digestion. Feeding during the coolest parts of the day can help reduce heat load.
Many producers achieve positive results by:
Feeding early in the morning
Reducing feed availability during the hottest hours
Providing feed again during the evening or night
Chickens are usually hungriest in the morning and tend to stuff themselves. However, they the become more susceptible to heat stress in the afternoon. A solution may be to withdraw the feed six hours before the afternoon peak, thus reducing the risk of heat stress.
The feed can be reintroduced after the peak temperatures have gone down. The chickens can then eat during the night when cooler temperatures are expected. When lowering the feed line, it is important that the feeders are already full. The lights can be used during the night-time (midnight) to get the chickens to eat.
Depending on how often this feeding method is used, some loss in body weight may be noticed. So only follow this feed method when heat stress temperatures are expected.
Ensure access to cool drinking water
Water consumption may increase two to four times during heat stress.
To encourage water intake:
Provide continuous access to fresh water
Protect tanks and pipelines from direct sunlight
Maintain water temperatures as low as possible
Regularly inspect drinkers to ensure proper functionality
Adequate water space, well-functioning waterers and cool water temperatures will encourage the chickens to drink. Provide sufficient fresh and cool drinking water regularly (around 20°C is ideal). Protect drinking water from direct sunlight to keep it cool: use a roof over the tank and paint the tanks white to get cool drinking water.
Nutritional Support During Heat Stress
Nutritional interventions can help poultry better cope with heat stress and maintain performance.
Supplement electrolytes
Heat stress increases the loss of important minerals such as sodium, potassium, magnesium, phosphorus, and zinc. Electrolyte supplementation helps maintain hydration, acid base balance, and water intake.
Providing electrolytes before and during periods of heat stress can improve bird resilience and reduce performance losses.
An option to reduce heat stress is to add electrolytes to the flock’s drinking water for up to three days. Loss of several minerals including potassium, sodium, phosphorus, magnesium and zinc, is caused by heat stress. To increase water intake, electrolytes can be used. Provide electrolytes prior to the heat stress period
Sodium bicarbonate for laying hens
The excessive panting associated with heat stress can alter the acid base balance in poultry.
Supplementing sodium bicarbonate can help support:
Acid base regulation
Eggshell quality
Egg production during hot periods
For laying hens, the use of sodium bicarbonate in the feed or the use of carbonated water is useful. The acid-balance can be altered in poultry by panting and the release of carbon dioxide due to heat stress. In addition, the available bicarbonate, which is important for eggshell formation, may be altered. By reducing this changes, sodium bicarbonate can be used.
Strengthening Poultry Resilience with Champrix Solutions
While management practices are essential, targeted nutritional support can provide an additional layer of protection against heat stress.
Vitaprix: vitamin and amino acid support during stress
Vitaprix is specifically designed to support poultry during challenging periods such as heat stress.
Benefits of Vitaprix include:
Supports recovery after stress
Helps maintain bird health and vitality
Provides essential vitamins including A, D, E, C and B-complex vitamins
Supplies critical amino acids such as lysine and methionine when feed intake declines
Supports egg production and eggshell quality during periods of heat stress
By helping birds meet their nutritional requirements despite reduced feed consumption, Vitaprix contributes to maintaining productivity and flock performance.
Supplementing drinking water with vitamins (A, D, E, C and B complex) can be effective at tackling heat stress mortality in broilers. In breeding poultry, vitamin C can effectively moderate the decrease in egg production and eggshell quality in laying hens caused by hot temperatures. Vitaprix helps to prevent disease and to recover more quickly after a period of stress. When the chicken’s feed intake is low due to heat stress or other factors, amino acids, such as lysine and methionine are still provided.
Heat-Champ: targeted heat stress management
Heat-Champ is a specialised Champrix solution developed to reduce the negative effects of heat stress in poultry.
Key benefits include:
Supports heat tolerance
Encourages feed intake during hot periods
Improves feed efficiency
Helps reduce mortality
Supports technical performance
Contributes to improved egg production
Helps maintain growth performance
For poultry producers operating in regions with recurring high temperatures, Heat-Champ can be a valuable addition to a comprehensive heat stress management programme.
Heat-Champ reduces/prevents heat stress in poultry and benefits from improved feed intake, improved feed efficiency à reduced feed costs, increased heat resistance, lower mortality, better technical performance, improved egg production and shortening of the finishing period.
Why a Preventive Approach Matters
The economic impact of heat stress can be substantial. Lost growth, poor feed conversion, reduced egg production, lower flock uniformity, and increased mortality all affect profitability.
Successful heat stress management requires a combination of:
✅ Effective ventilation
✅ Good housing design
✅ Correct stocking density
✅ Smart feeding schedules
✅ Continuous cool water supply
✅ Electrolyte support with Heat-Champ
✅ Vitamin supplementation with Vitaprix
✅ Ongoing flock monitoring
By taking a proactive approach, producers can protect flock health while maximising technical and financial performance.
Keep Your Poultry Performing During Hot Weather
Heat stress does not have to limit your production results. With the right management practices and nutritional support, poultry can remain productive, healthy, and resilient throughout the hottest periods of the year.
Ready to Protect Your Flock from Heat Stress?
Do not wait until rising temperatures impact your flock's performance.
Discover how Champrix Heat-Champ and Vitaprix can help maintain performance, improve resilience, and protect profitability during challenging environmental conditions.
👉 Contact Champrix today to discuss the best heat stress strategy for your poultry operation.
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
Expertise that Empowers
At Champrix, we offer extensive practical knowledge across a wide range of feed solutions. We go beyond expertise and actively guide our partners through every step of their journey.
READ MORE
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