The Most Common Signs of a Mouse Infestation: Know What to Look For

Infestations in the Home

Mice are more than just a nuisance. They can cause significant damage to your property, contaminate food, and even spread diseases. If you suspect that these tiny creatures have taken up residence in your home, it’s essential to confirm their presence as soon as possible and seek the services of the best company for pest control in Portland

In this blog post, we’ll discuss the common signs of a mouse infestation, helping you identify and address the problem promptly.


One of the most telltale signs of a mouse infestation is their droppings. Mouse droppings are typically small, about the size of a grain of rice, and dark brown. You may find these scattered in areas where mice have been active – your kitchen, attic, basement, or behind furniture.

Gnaw Marks

Mice have strong teeth that continuously grow, which makes them gnaw on various materials to keep their teeth in check. If you notice gnaw marks on your furniture, wires, food containers, or walls, it could indicate the presence of mice. Fresh gnaw marks will appear lighter, while older ones darken over time.

Unusual Noises

Mice are nocturnal creatures, so they are most active at night. You might hear scratching or squeaking noises coming from your walls, ceilings, or floors during the quiet hours. These sounds can be an indication of mice moving around your house.

Mouse Nests

Mice build nests using soft and shredded materials like paper, fabric, or insulation. These nests are usually located in hidden, quiet areas such as behind appliances, inside cabinets, or in wall voids. If you stumble upon these nests while cleaning or rearranging, it’s likely you have a mouse infestation.

Foul Odor

A persistent, musky odor in your home could be a sign of a mouse infestation. Mice urinate frequently, and their urine has a strong, ammonia-like smell. If you have pets, they may become more alert or excited due to this odor, as they can smell mice even if you can’t.

Tracks and Runways

Mice tend to use the same paths when they move around your house. Over time, these paths or ‘runways’ may become visible in the form of greasy marks on walls or floors, or tracks in dusty areas.


Seeing a live mouse in your house is an obvious sign of an infestation. But remember, mice are quick and nocturnal, so you’re more likely to spot the signs of their activities than the mice themselves.

Damage to Food Packages

Mice need to eat, and your pantry or kitchen cabinets provide them with a variety of options. If you notice holes in food packages or find that food has been eaten, mice could be the culprits.

Recognizing the signs of a mouse infestation is the first step toward addressing the problem. If you notice any of these signs, it’s important to take action quickly. Whether you choose DIY methods or seek professional help, dealing with the infestation promptly will prevent further damage and potential health risks. 

Remember, prevention is always better than cure, so keep your home clean, seal possible entry points, and store food in airtight containers to deter these unwelcome guests.



Leave a Reply

Your email address will not be published. Required fields are marked *