They can chew through just about anything over time.
Do Mice Chew Through Walls. I have a very old house built in 1876 and the walls are plaster and lath and i have had mice chew holes literally over night. You need to know what you are up against!
Long Haired Mouse Information and Facts - Pet Mice Blog.co.uk from petmiceblog.co.uk
Mice tend to run along the same paths and stay close to the wall. They gnaw through walls, they often gnaw through cables, causing electrical problems or interrupting data transmission, they will eat stored food if they can, they may carry fleas, etc. Mice have flexible skeletal systems and they can fit through crevices, cracks, and holes as small as ¼ of an inch.
The thread about the mouse chewing through a coffee bag made me wonder.
Using a combination of steel wool and caulk (flexible. You may see debris on your shelf or gnaw marks on boxes or bags of food. When trapped, they will chew their way through wood, cardboard, clothes, anything that gets in their way from point a to point b. If the mouse chews it way through you probably will never find the hole and it wont be a problem.
