The dead chickens.... That is telling enough to get far away. It's Canary in the coal mine!
Canary in the coal mine; Etymology . An allusion to caged canaries (birds) that miners would carry down into the mine tunnels with them. If dangerous gases such as carbon monoxide collected in the mine, the gases would kill the canary before killing the miners, thus providing a warning to exit the tunnels immediately.
Birds are more sensitive to toxic gas
The dead chickens.... That is telling enough to get far away. It's Canary in the coal mine!
Canary in the coal mine; Etymology . An allusion to caged canaries (birds) that miners would carry down into the mine tunnels with them. If dangerous gases such as carbon monoxide collected in the mine, the gases would kill the canary before killing the miners, thus providing a warning to exit the tunnels immediately. Birds are more sensitive to toxic gas