€¢ Corn cellulose formula controls rats and mice resistant to conventional rodenticides €¢ No chance of secondary poisoning with non-target animals or humans €¢ Corn-based product interferes with the rodents' digestive system and causes dehydration €¢ For indoor use only Wilson Wilsarin rat & mouse killer is a corn-based product designed to effectively kill rats and mice that are resistant to conventional rodenticides. When consumed; the corn cellulose in the pellets interferes with the rodents' digestive system; causing dehydration. It should be placed where signs of mouse or rat activity such as fresh droppings can be observed or near burrows; runs; feeding places and points of entry. There is no risk of secondary poisoning in humans or non-target animals. Includes six 60 g place packs. For indoor use only."