510 ILCS 70/3.07
Any veterinarian in this State who observes or is presented with an animal or animals for the treatment of aggravated cruelty under Section 3.02 or torture under Section 3.03 of this Act must file a report with the Department and cooperate with the Department by furnishing the owner's name, the date of receipt of the animal or animals and any treatment administered, and a description of the animal or animals involved, including a microchip number if applicable. Any veterinarian who in good faith makes a report, as required by this Section, has immunity from any liability, civil, criminal, or otherwise, that may result from his or her actions. For the purposes of any proceedings, civil or criminal, the good faith of the veterinarian shall be presumed.
An animal control warden, animal control administrator, approved humane investigator, or animal shelter employee may humanely euthanize severely injured, diseased, or suffering animals in exigent circumstances.
510 ILCS 70/3.07