When I moved in with other half there were decomposing and mummified mice in the kitchen cupboards and behind the tv in the living room.
I cautrently have 2 traps set and have caught 9 mice in a week-they just keep on coming in.
We had a horrible stink we couldn't track down. Eventually found a pressed mouse in a magazine. Presumably one the cats had brought in to play with later
My daughter appeared from under a table last week holding a handful of dried out mouse guts. No idea how long they'd been there. She's much less squeamish than me.