The little varmints sounded like they were having a party in our attic and in the floor between the stories. :-(

He put out several of these bait holders -

and used this bait - He claimed that it doesn't affect anything that eats the mice, but one obviously wants to keep it away from pets and beneficial animals. (He wanted to put it outside out home (along the foundation wall), but I'm against that.)

It didn't work instantly, but it does seem to have helped a great deal. I bought a refill bucket of my own and more bait holders (to use here, and to put a few out at my step-mom's place).

Might be worth a try.

Good luck!