I've heard of using shed snake skin powder as a deterrent.
Perhaps you could look up all the non-poisonous ways to control the rodent population, print it out, and hand a packet to the other tenant and landlord. Include information of course on just how dangerous Decon is and how it makes any animal that consumes it suffer. All the gory details of what it does internally.
(We were SOOOOO mad when we did the inspection on this house and it was almost perfectly clean, then when we moved in there was Decon EVERYWHERE. ARRRRG!!! )
(We mostly use snap traps, but we also use the humane traps.)
Let nature guide your actions and you will never have to worry if you did the right thing. ~ crow_noir
The pet world excels where the human world is lacking; sterilization and adoption. ~ crow_noir
Please, if your dog is arthritic look into getting it Elk Velvet Antler. Look up my posts on it, PM me, or look it up on a search engine; but please if you love your dog and want it to live many more years consider this option. I've seen so many posts on here about dogs needlessly suffering. I can't make a new post about EVA every time so this plea is going here. EVA also helps with other ailments such as anemia.