Physical pest control products generally kill the rodents on the spot; keeping these devices away from places where food is packaged or stored can prevent food contamination. (fooddrink-magazine.com)
These D - Con bait pellets start the process to kill your rodents in 4 to 5 days. (geekwrapped.com)
They don't usually kill rodents; the program works because their scent is enough to keep rats away. (animalsheltering.org)