don't get caught doing it in IL unless there are cattle or some farm animals in the same place. here is what the IL digest of hunting and traping regulations says

Feeding wildlife,it is unlawful to make food,salt,mineral blocks or other products for ingestion by wild deer or other wild life in area's where deer are present.except, bird and squirrel feeders with in 100 yards from your home ,incidental feeding of wildlife in a active live stock operation.or feeding wild animals by hand as long as you clean up any unconsumed food and it just goes on like that