I've had mice die in my walls a number of times over the years, most recently in the wall right next to where my computer is. The good news is that if it's just a small mouse, the odor will dissipate in a few days. The bad news, as you know, is that it's retchingly awful! I recently got a sample of a product called Fresh Wave, http://fresh-wave.com/ It's all natural, pet and people safe, has a pleasant scent and seems to work. But please do NOT stuff your landlord between the walls--that odor will last a LONG time! :-O Linda [Posted in FML 7000]