Killing mice and the like with poison
Question
Question: In many houses mice multiply in very large numbers and damage the grain and the like stored in the houses. Sometimes they also gnaw through the grain bins, sacks and clothes. They live by making holes in the ground and in ceilings and the like. Fed up with the house mice, people kill them by giving them poison. What is the ruling in such a case? May poison be given to mice or to any harmful creature such as ants and the like, or not?
Answer
Giving poison, or simply killing them otherwise, is also permissible.
Source: Fatawa Mahmudiyya
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