RATSAK NATURALS is a rodent bait that kills rats and mice by causing them to dehydrate. It is made from natural ingredients and whilst deadly to rodents it is safe around humans and animals when used according to instructions. Rats and mice have strong stomach sensors that tells them when they are thirsty. When they eat the RATSAK Naturals it turns off the stomach sensors and rodents stop drinking. These stomach sensors are unique to rats and mice.