+25 Signs Of Mouse Infestation 2023. Rats leave large tooth marks and can gnaw through walls, flooring, insulation, wiring, and soft metals, such as lead and aluminum. Web signs of a mouse infestation include droppings, gnaw marks, nests, and the presence of live or dead mice.
Rat droppings are double the size of mouse droppings, usually measuring about 1/2 inch long and tapered at one end. Mouse droppings are tiny pellets (like grains of rice) that will often be clustered in areas near the nest. Web signs of a mouse infestation include holes, gnaw marks, sounds, and droppings.
