Chicken Heat Stress: UK Backyard Flock Guide

A run that is shaded in the morning may be in full sun by afternoon. Walk around the enclosure at different times and ensure the birds can all reach covered areas. Trees, secure shelters and suitable shade cloth can help, provided ventilation remains good. The RSPCA's chicken-care guidance calls for overhead cover, a dry ventilated house and constant clean water.

Check drinkers at least daily, and more often in hot spells. Refill them with fresh water and clean any that are soiled. Provide enough drinking points that a dominant hen cannot keep another away. Keep feed and water sheltered from wild birds and rodents, consistent with current biosecurity advice. Do not assume a coop is cool because the outside air feels comfortable; check the inside during the warmest hours.

A chicken may hold its wings away from its body, pant or become less active while trying to lose heat. Weakness, inability to stand, severe breathing difficulty or collapse need urgent veterinary advice. Move the affected bird into a safe shaded, ventilated place and offer water if it is alert enough to drink normally. Avoid forcing liquid into a weak bird. Ask your poultry vet for species-appropriate cooling and transport instructions.

Watch the whole flock. If several birds are sick, eggs have suddenly declined, or deaths are unexplained, do not assume heat is the only explanation. Suspected avian influenza is notifiable; GOV.UK explains the signs and reporting route. Call a vet and follow the current APHA instructions immediately if you suspect it.

Review shade as the sun moves, check airflow without leaving the house insecure, reduce crowding and keep dry places to rest and dust-bathe. Record when signs appeared, the weather, whether water was available and how many birds are affected; those details help the vet. In warm weather, check birds for soiling around the vent and flies. Our chicken health guide covers daily checks, legal feeding and flock registration.