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5 Common Signs of a Mouse Infestation

mouse infestation

Mice may be tiny, but their presence can lead to significant problems in your home. These small rodents are notorious for their ability to sneak into spaces unnoticed and wreak havoc. Mice can contaminate food and water sources, as well as spread disease and cause damage to your property (Erhlich). Identifying a mouse infestation early is crucial for effective control. In this blog, we will explore the common signs of a mouse infestation.

1. Droppings

One of the most evident signs of a mouse infestation is the presence of mouse droppings. These small, dark pellets are typically found near food sources or along their travel routes. Fresh droppings are a darker black color and have a moist sheen. Older mouse droppings usually fade to a light brownish-gray color and are very hard and dry. Droppings can begin to look faded and old around 48 to 72 hours after they’re produced. (Hawx)

2. Gnaw Marks

Mice have a constant need to gnaw on objects to keep their teeth from growing too long. This behavior often leads to gnaw marks on various items, including food packaging, electrical wiring, and wooden structures. New gnawings or holes tend to be rough whereas old gnawings are smooth from wear.

3. Scratching Noises

Mice are most active at night, which is when you might hear scratching or rustling sounds. If you notice these noises it's a strong indication of a mouse infestation. These sounds typically occur in walls, ceilings, and attics (PPC).

4. Nests and Nesting Materials

Mice build nests in secluded, hidden areas to raise their young. These nests are typically Entrances are usually material packed/compressed, and rub marks sometimes visible. constructed from materials such as paper, fabric, insulation, and even shredded cardboard. If you stumble upon a collection of shredded materials in a quiet corner or unused space, you might have discovered a mouse nest.

5. Tracks and Runways

Mice frequently use the same paths, usually along walls, stacked merchandise, etc. Tracks may or may not be visible. When they are, you can identify these tracks as greasy smudges or dirt marks along walls and baseboards. By examining these routes, you can determine the areas mice frequent.


Detecting a mouse infestation early is crucial for effective control and prevention of potential health risks and property damage. By keeping an eye out for these common signs you can address the infestation properly. If you suspect a mouse infestation in your home or business, seek professional assistance at Ohio Pest Control to ensure a safe and mouse-free environment. Learn how to get rid of mouse infestations in your home. Learn more about our mice control.


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