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If you can't have a cat, you can always ask friends for used kitty litter from time to time and put it in a box where you hear/see mice...

Actually, I just remembered that one day many decades ago as I was pointlessly releasing a field mouse that I had caught in my apartment into the garden at the back of the building, a long-term tenant apologized for not keeping up to date with her voodoo. She said that she usually got a chicken and voodooed around the property once every few years to discourage rodents and underwear thieves, but that she felt that her voodoo didn't "stick" quite as effectively as her mother's used to. So that's another option!