When the weather warms up, it's important to keep a close eye on your chickens. Just like us, birds can struggle in hot conditions, but unlike humans, chickens can't sweat to cool themselves down. Instead, they regulate their body temperature mainly through panting and releasing heat from their bodies. 


Most chickens cope well in temperatures up to around 28°C, but prolonged periods of heat can quickly lead to heat stress, especially in enclosed coops or poorly ventilated runs. Knowing the signs early and making a few simple changes can make a huge difference to your flock's comfort and wellbeing. 


Signs of Heat Stress in Chickens 

Chickens experiencing heat stress will often change their behaviour in an attempt to cool down. Common signs include: 

  • Panting or open-beak breathing 
  • Holding their wings away from their body 
  • Lying flat on cool ground or bedding
  • Seeking shade and avoiding activity 
  • Reduced appetite 
  • Increased drinking 

These behaviours are your flock's way of trying to regulate body temperature before things become more serious. 


Why Heat Stress Can Be Dangerous 

If chickens become too hot for too long, it can affect both their health and egg production. 


Egg Production and Eggshell Quality 

One of the first things many keepers notice during hot weather is a drop in egg production. Eggs may also have thinner or weaker shells due to changes in calcium balance within the birds' body. 


Increase Risk of Illness 

Panting helps chickens cool down, but it also means they bypass some of the natural filtering systems in their nasal passages. This can leave birds more vulnerable to respiratory issues and infections. 


Reduced Appetite and Gut Health Issues 

Chickens often eat less during hot weather, which can affect growth in younger birds and condition in older hens. Some birds may also develop digestive disturbances or diarrhoea. 


Dehydration and Electrolyte Loss 

Water intake increases significantly in warm conditions. Without constant access to cool, clean water, birds can quickly become dehydrated and lethargic. Electrolyte imbalance may also develop during periods of excessive heat. 


Severe Heat Stress 

In extreme cases, prolonged high temperatures can become life-threatening.  Once a chicken's core body temperature rises too high, serious internal damage can occur very quickly. 


How to Help Chickens Stay Cool in Hot Weather 

Fortunately, there are several simple ways to help prevent heat stress and keep your flock comfortable during the summer. 


Provide Plenty of Shade 

Make sure your birds always have access to shaded areas throughout the day. Trees, tarpaulins, shelters or shaded runs can all help birds escape direct sunlight. 


Improve Coop Ventilation 

Good airflow inside the coop is essential during warm weather. Opening vents, increasing airflow and using fans in larger houses can help reduce heat build-up and improve air quality. 


Keep Water Fresh and Cool 

Always provide plenty of clean, cool drinking water and check it regularly throughout the day. During heatwaves, adding poultry electrolytes to the water can help reduce heat build-up and improve air quality. 


Avoid Overcrowding 

Overcrowded housing traps heat and limits airflow. Giving your chickens enough space allows them to spread out and stay cooler. 


Cool the Coop During Extreme Heat 

In very hot weather, lightly spraying water around the outside of the coop or run can help reduce surrounding temperatures. Some keepers also use nearby sprinklers to safely cool the area. 


By planning ahead and monitoring your flock closely during hot spells, you can greatly reduce the risk of heat stress and help your chickens stay healthy and happy all summer long.