I have mice in my house.
I cleaned out under the guinea pig cage today because the Fudge Creature, who has the bigest cage in existence which is apparently big enough for two rabbits, persists in chucking his hay out over through the bars, and periodically it needs doing. So I did it, moved all the stuff, moved HANDFULS of hay (no wonder he's always hungry!) and then discovered little tiny bits of hay. And a little store of food. And little tiny bits of poo. And a pervasive odour.
Now there are several good point here. It took me a while to find them, and I had to stretch a bit, even with my Pollyanna like tendancies, but I did find them.
1) The mice or mouse can only have been there since the demise of Tim-The-Cat which was only 6 weeks ago, and therefore that is a good thing.
2) There is a hole in the brick of the fireplace nearby. Ambitiously, I have decided that that is the entry and exit point for a sweet little field mouse, and have blocked the bugger accordingly.
3) The boiler cupboard is now cleaned out, the pig stuff is in the boiler cupboard, and therefore one of my long term "I must do that" jobs is already done.
Like I said, some of them were a bit of a stretch.
I am going to insist that we get another cat, asap. Or two.