Any owner seeing his or her livestock, poultry, or equidae being injured, wounded, or killed by a dog, not accompanied by or not under the supervision of its owner, may kill such dog.
510 ILCS 5/18
Any owner seeing his or her livestock, poultry, or equidae being injured, wounded, or killed by a dog, not accompanied by or not under the supervision of its owner, may kill such dog.
510 ILCS 5/18