Question: It has been said that rat and mouse poison such as, brodifacoum and warfrin, makes these pests thirsty. After the poison is eaten the pest will try to find water prior to death.

Thus the pest will more likely die outside rather inside a house or building. Is this true?

ANSWER   These chemicals cause internal bleeding in mice and rats.  I do not think that they become thirsty.  They only leave if their nest is outside the building. If the nest is inside, they die inside the building. There is no way to predict where the rat or mouse will die, but often it is in an inaccessible place - inside a wall or in an attic. When that happens, there is an odor for a few days.