Why Do Mice Scratch Walls. Mice will emerge from your walls in search of food, and that's your best window of opportunity to catch them. I'm hearing what sounds like a mouse in one wall on the first floor of the house and in the ceiling adjacent to that wall.
Typically too small to see with the unaided eye, it consists of a watery fluid surrounded by a membrane or wall.
At one time, you may have asked yourself, why does my cat scratch the wall at night? Sensory signals of one type can be overridden by signals of other types if the latter are strong enough. How to get rid of mice? Almost every continent on planet earth has mice and mousse infestations have plagues humans for centuries.