Knowing how to manage heat stress in broiler chicken is a profitable way to save your flock, increase their growth and maximize profit. We will show you how to recognize the signs of heat stress in your birds and its effects on broiler chickens.
The impact of sudden temperature alterations on broiler chickens results in heat stress; an issue that needs mitigating, for which there are numerous effective approaches.
As a broiler chicken farmer, you’ve got to know your birds inside and out, you need to understand that this condition can kill your birds in days, but if you know what you’re doing, you can keep them alive by activating easy-to-apply heat stress management tips for broiler chicken flock.
What is heat stress in broilers?
Heat stress in broilers refers to the negative effects high temperatures can have on broiler chickens (chickens raised for meat production). Some key points about heat stress in broilers:
-Broilers are susceptible to heat stress due to their rapid growth rate and feathering, which limits their ability to thermoregulate. They lack sweat glands and are covered with insulation in the form of feathers.
-Heat stress occurs when the broiler’s body temperature rises above its thermal neutral zone, which is around 20-23 °C (6-73 °FF). This causes physiological changes as the bird attempts to lose heat.
-Hot weather, high stocking density, poor ventilation, and high humidity can all contribute to heat stress. Risk is highest at 5–6 weeks of age when feather cover is greatest and body heat production highest.
A broiler’s internal temperature may rise above normal due to metabolic activity, as well as the heat produced by muscles, hair follicles, and feathers.
The higher the ambient temperature, the greater the amount of heat the birds generate and this makes the bird’s body temperature rise.
As a result, your broiler chickens stop eating, stop drinking water and they will eventually lose weight. It is also possible that they die if they are exposed to this condition for a prolonged period.
Signs of heat stress in broiler chicken
Several symptoms indicate this condition in broiler chickens. The most common sign is
increased respiration while others are:
1. Restlessness
2. Increased breathing rate
3. Increased water consumption
4. Reduced feed consumption
5. Sudden death
6. Lying down with their neck stretched out on the floor
7. Panting
8. Excessive drooling/salivation
9. White patches on the wattles
10. Darkened comb
11. Drooping wings
12. Diarrhea / Watery poop
.jpg "Actions to combat Heat Stress in Broilers")
Causes of Heat Stress in Broilers
There are various reasons for this condition in broilers. First, is the sudden temperature change. Abrupt fluctuations in temperature inside the broiler house critically impact the internal temperature of broiler birds, posing harmful health consequences if prolonged.
Other factors responsible for heat stress in broilers include:
- Feed quality/improper
nutrition. - Overstocking/overcrowding.
- Poor ventilation.
- Lack of shade.
- Inadequate water intake.
- High humidity.
- Insufficient availability of water troughs.
Managing heat stress in broilers?
You can successfully raise a flock of healthy broiler chickens by following these basic heat stress management tips to easily minimize or prevent losses.
Here are some management tips to prevent heat stress in broilers:
Better Pen Design
To prevent heat stress in broilers, it is important to design a broiler pen house with proper airflow and protection.
When constructing a broiler house, make sure that there are adequate air vents and proper ventilation for the house.
The walls of the pen house should be covered with wire nettings to allow the free flow of fresh air in and out of the pen to help the birds stay cool.
The broiler house should also be built with a roof which provides an adequate amount of shade for the broilers.
Temperature/humidity
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| Broiler chick lowers body temperature by panting |
Heat stress can occur when the ambient temperature and humidity exceed optimum levels, causing physiological changes in chickens.
Temperature and humidity conditions of the house during rearing go a long way in determining the health and welfare of broiler chickens.
Providing adequate ventilation and shelter from direct sunlight will help them to stay cool. They need to spend their time in a dry and not-too-hot location.
Monitoring the house temperature from time to time is necessary to be sure it’s a bearable degree.
Ventilation
Ensuring proper ventilation is crucial to maintaining the well-being of your chickens. It is recommended that you provide them with a shaded, well-ventilated area to spend their days in, away from direct sunlight.
Free flow of air enables the removal of carbon dioxide, ammonia and excess moisture from the poultry house, facilitating the movement of fresh air.
To enhance the indoor environment, it is recommended to shield from sunlight and wind and circulate fresh air inside by employing fans. Besides, fans can also assist in sustaining optimal temperature levels both during the day and at night.
Reducing stocking density
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| overstocking of chickens |
The stocking density is the number of birds per square meter, and it is a factor that can contribute to heat stress in broilers. Overcrowding or overstocking is stressful for chickens and causes them to eat less.
If you keep the birds too close together, the heat generated by the birds themselves will not be able to escape properly. In such a case, the broilers will be stressed and may even die. You may want to read floor Space Requirements for Broilers & Layers.
The broilers are supposed to have enough room to move around and stretch their
wings. You will have to provide them with enough space to stretch out and move around without getting too crowded.
Provide adequate fresh water.
One of the important stress management tips is to make sure that your birds always have access to enough fresh water. Broiler birds consume 2-4 times their normal water intake during heat stress.
It is crucial to provide your chickens with a sufficient supply of fresh and cold water throughout the day, especially in hot weather. For additional chilling, consider adding ice blocks to their water source.
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| Water keeps chicken hydrated. |
For the optimal health of your chickens, it is crucial to replace their drinking water constantly. This guarantees that your poultry has access to fresh and cool water, which reduces their body temperature and increases their hydration levels.
Providing adequate water space and functional waterers or water troughs will also encourage broilers to drink more to replace moisture loss due to heat.
Feed quality/proper nutrition
Providing broiler chickens with a well-balanced diet that meets their nutritional requirements is crucial in mitigating the impact of heat stress on their health.
It’s important to know what to give your birds at the right temperature to give them the best diet possible. A balanced diet for birds includes all the following:
• Vitamins and Minerals
• Proteins
• Carbohydrates
• Fat
• Water
Feeding birds with high carbohydrate feed in hot weather can cause discomfort and stress because of its high energy content.
To prevent overheating, it’s best to refrain from feeding your poultry during high ambient temperatures. To help your chickens eat and drink regularly, consider using artificial lighting from 5 to 6 in the morning.
At night, provide artificial light so that your chickens will be able to eat and drink more during the cooler hours of the night.
Vitamins and electrolytes
To reduce stress in broiler birds, you must provide sufficient amounts of vitamins and minerals.
Provide anti-stress in the form of minerals, vitamins, and electrolytes to the broiler
water birds to keep them hydrated and to reduce the level of heat stress.
Providing these vitamins and electrolytes will help prevent dehydration in the broilers and are also necessary for healthy body functioning.
Wet litter Management
Wet litter is one of the reasons why broilers are affected by heat. The wet litter generates heat that causes the broilers to sweat a lot, which leads to water loss and consequently dehydration.
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| Broiler birds on dry litter material (wood shavings) |
Providing dry litter materials is very important to prevent and reduce the effect of heat on broiler birds; it keeps the birds dry and cool. You should make sure that there is dry litter at least 1.5 inches below the bird’s feet.
Effect of heat stress in broiler chickens.
When birds are exposed to high temperatures, their body temperature increases, heart rate and breathing increases, and muscle tremors can occur.
Exposure to high ambient temperatures also makes broiler chickens lose body fluids, and they may become dehydrated. Loss of body fluids leads to weakness; a lowered immune system and the bird may eventually die.
If a broiler chicken’s body temperature increases, its immunity decreases, and the quality of its feathers worsens, which increases the chances of getting sick.
This can cause high mortality rates, poor growth performance, decreased body weight gain, and poor feed conversion efficiency.
FAQs
1. How can I prevent heat stress in broilers
To help your broilers regulate their body temperature, you can use an electric fan or a spray bottle to cool them down.
Make sure the chickens have access to fresh air and make sure they have access to plenty of fresh water during the hot season.
You may want to add cubes of the iced blocks to their water to keep them hydrated. You can also provide shade for them by putting up shade structures.
2. What can I do if I notice that my birds are not eating?
If your birds are not eating, it could be that they are experiencing heat stress. Make sure that you monitor your birds’ temperature and if it continues to rise, consult a veterinarian or a poultry specialist for advice.
3. How do I know my broilers are stressed by heat?
Be aware of the following indicators: • Elevated breathing rate • Skin discolouration • Reduced hunger • Impaired motor function • Limp wings • Excessive panting • Drooling • Nausea • Bowel irregularity • Fatality.
Conclusion.
Broilers are vulnerable to high temperatures, which predisposes them to heat stress. One way to help ensure that your birds are healthy and free from this condition is to help them cope with high temperatures.
The rate at which their body temperature rises depends on the rate at which their body produces more heat and is exposed to extreme temperatures.
By using these stress management strategies, you can ensure the health and well-being of your birds and the success of your broiler farming business.
Disclaimer
The information in this article is for educational purposes only and should not be considered a substitute for professional veterinary advice. Always consult with a qualified veterinarian for any health concerns or before making any decisions regarding the care or treatment of your animals.
