Halacha Corner – Catching Mice
Q. When I catch a mouse do I need to kill it before disposing of it?
A. It is permissible to trap mice if they are a nuisance. It is recommended not to allow their extended suffering while in the trap, but to do something which will hasten their death.
Rav Yosef Yeshaya Braun, shlita, member of the Badatz of Crown Heights, AskTheRav.com #1016, reprinted from chabadinfo.com