Other wildlife like birds, squirrels, lizards, etc. can drink the antifreeze and die. If you have a rainstorm that overflows the container it could swamp your chickens area and poison them or leach into the groundwater.
Depending on your jurisdiction, it may be illegal to use antifreeze the way you are.
And raccoons are very smart! The chance of them learning and avoiding the poison is high.
Get some hardware cloth. Secure the coop. Locking your birds in a safe secure coop at night will protect them.
Depending on your jurisdiction, it may be illegal to use antifreeze the way you are.
And raccoons are very smart! The chance of them learning and avoiding the poison is high.
Get some hardware cloth. Secure the coop. Locking your birds in a safe secure coop at night will protect them.