Whatever it is, I'd rather it didn't sound like it was about to gnaw its way through my floor then burst onto my pillow in the middle of the night in the dark when I'm by myself :)) Thing is, emilydrab, thanks for your positive and supportive post, but I have actually lived in a place with rats, which did indeed gnaw through the floor, and the farmer had to put metal plates down eventually. They also built little stores of food in my kitchen cupboards, eg moving chickpeas into the box of teabags, which in a way was quite endearing but also possibly not something you want to encourage :) Stupid thing is, I did encourage them, they used to swing off the bird peanut feeder (this is absolutely true), I thought they were squirrels until I saw they had rather thin tails for squirrels :-$ I felt like the Pied Piper, I can tell you Edited to correct drunken typos :)