510 ILCS 5/18.1
The owner or keeper of a dog is liable to a person for all damages caused by the dog pursuing, chasing, worrying, wounding, injuring, or killing any sheep, goats, cattle, horses, mules, poultry, ratites, or swine belonging to that person.
(from Ch. 8, par. 368.1)
(Source: P.A. 88-600, eff. 9-1-94.)