First of all, not all the rats will find and eat the poison. They mostly eat food outside, and they are scattered in your attic and house, and most of them never come across the poison. Second of all, not every rat who eats the poison will die. ... Read about dead rats in the attic if you've set out poison.
Will rats eventually eat poison?
When they consume the poison, they will suddenly have a strong, unquenchable thirst. That will lead them outside, in search of water, where they will eventually die. With this idea, poison seems like the obvious answer. ... Poison is not going to have this effect on rats or mice, or any other animal for that matter.
Will poison attract rats?
Putting out poison attracts rats, just as putting out a quail block attracts quail. ... Even if the poison kills the rats, they still have plenty of time to leave their scent before they die. The scent (just like dogs) attracts other rats from outside areas.