I got blessed to have Rats with super immunity. The Rats bypassed poisoned rat tablets, they bypassed the Rat Zapper. The ONLY thing that kills them is good ole plain starvation and thirst. I had two rats die in my closet last year of starvation and thirst. The third rat l found dead yesterday was on my floor. Better than in my closet. I will just have to wait for the fourth rat to die of starvation and thirst.