In the spirit of Halloween I have just been reading up on the Fox Sisters. Sibelius, try saying, "Mr. Splitfoot do as I do." then clapping your hands four times. If you hear four taps in response, either there's a spirit in the house, or someone is cracking their toes. (Which is how one Fox sister claimed they made the noises.)
Quite seriously, I'd try the terrier. My sister has a terrier mix, (Part yorkie, part jack russell, part your guess is as good as mine.) shortly after the beastie took up residence, she killed a rat that had been living in the kitchen.
A friend had bats in her attic. Someone offered a black persian cat, called the Ayatollah Kitty Meini to take care of the bats.
In "Rats in the Walls" an American living in his ancestral home in England finds that his forbearers bred a race of subhuman creatures, that still inhabit the walls of the house. Bleah!