My dad left a box of Malteasers he was going to give someone in the back of the car. When he opened the boot a few days later, there was a hole about the size of a 10p coin (50 Euro cents) and the box was
completely empty not even a crumb was left.
Also, a few months ago I was sitting downstairs and there was a rat/mouse looking at me through the window, I got a fright, but ignored it. Later, I went to bed and then I heard scratching. I went outside and dude was scratching at the ventilation grille into the house, so I placed a tile over the vent and put poison down. I've slept very well since.