Workers were seen piling up chicken carcases after the farm in Lincolnshire was hit by high temperatures last week.
Thousands of chickens have been killed in the heatwave at Moy Park farm in Lincolnshire after temperatures soared last week.
Workers were seen piling up the birds at the farm after the extreme weather hit last week.
The workers told The Lincolnite the chickens had died due to the hot weather and they had tried ’everything’ but there was nothing they could do.
Moy Park hit the national headlines last month after Animal Equality UK said it had uncovered ‘extreme suffering’ at the farm which supplies major supermarkets and is audited by Red Tractor.
A spokesperson for Red Tractor said: "Animal welfare is our top priority and we require all certified poultry farms to do all they can to protect their birds.
"Record temperatures last week posed significant challenges for livestock, pets and humans alike.
"We will continue to work with the poultry industry to review how to minimise the impact of extreme weather conditions on their farms."
The British Poultry Council said: "Extreme high temperature presents a significant challenge to the health and welfare of livestock as well as people and pets up and down the country.
"In these extraordinary weather conditions, British poultry meat producers are working incredibly hard to carefully control and mitigate the effects of the heat. Bird health and welfare remains a top priority for poultry meat farmers.
"Our poultry houses have all the necessary ventilation systems in place that control and monitor the environment combined with the animal husbandry skills and extra vigilance of our highly trained people.”