October 1, 2026

Customer Care Team Leader

How to Tell If You Have Mice Before You See One

When mice get into your house, they don’t spend their days scurrying around your living spaces, narrowly avoiding close encounters with your cat. Instead, they keep to themselves, staying out of the way, and often only coming out at night after you’ve gone to bed. Because of this, mice can live in your house for quite some time without you ever seeing a live one.

Thankfully, you don’t have to see a mouse to know whether you have these destructive creatures in your house. They leave behind plenty of evidence of their presence when they move in. Droppings, gnaw marks, and nests are just a few of the signs that indicate a mouse infestation. Knowing the warning signs can help you identify a problem early, which will help you avoid many of the issues mice cause when they get into Tennessee homes.

What Do Mouse Droppings Look Like?

Mouse droppings are one of the most common signs of a mouse infestation. They’re also fairly easy to find and identify. When mice get into your house, they will leave droppings wherever they go. Being able to identify them can help you identify an infestation and know where they’re spending time.

Mouse droppings are small and dark. They are pellet-shaped and similar in size and shape to grains of rice. You’ll often find them in the following areas:

Inside cabinets and drawers
Under sinks
Near food storage
Behind appliances
Along baseboards
In garages, attics, and storage areas

Repeated droppings in the same areas can suggest an active travel route, but finding droppings in any location means that mice have been there at least once.

What Do Mouse Gnaw Marks Look Like?

Mice have teeth that never stop growing. In order to keep them at a manageable length, they have to constantly chew on things to wear the teeth down. Once mice get into your house, they’ll find things around your home to gnaw on. You may find gnaw marks on:

Food packaging
Cardboard
Baseboards
Wood
Plastic
Stored items
Wiring

Other signs of mice having chewed on things in your house include finding small, jagged holes in packaging, plastic or paper shavings, or chewed corners.

What Do Mice Sound Like Inside Walls or Ceilings?

Mice may be small, but they can make quite a ruckus, especially when your house is quiet. Mice are most often active at night, which coincides with the time when your house is usually the quietest. Since they often nest inside wall voids or attic spaces, you may hear rustling, scratching, or squeaking sounds in your walls or ceilings.

If you do hear unexplained sounds in your house, it’s not a definite sign of mice, but it’s certainly a sign that you’ll want to investigate further. Even if mice are not present, other pests might be.

What Are Mouse Grease Marks?

When they come into your living spaces, mice typically use the same paths to get from place to place. They don’t like to be out in the open, so they usually stick close to walls and often rub up against baseboards as they run. The grease from their fur can get transferred to your walls, leaving oily marks behind, especially after repeated runs.

What Does a Mouse Nest Look Like?

Mice use a variety of materials to build their nests. They look for materials that are soft and shreddable, such as paper, fabric, cotton, cardboard, and insulation.

Because they want to protect themselves, mice build their nests in out of the way spaces that are safe and secluded. Mice nests are often located:

Behind appliances
Inside cabinets
In attics
In garages
In storage rooms
In wall voids
In dark corners

Finding shredded materials in an unusual location may not be a sure sign that it’s a mouse nest, but if you also find droppings in that area, you can be confident in what you found.

Can You Smell a Mouse Problem Before You See One?

As if it weren’t gross enough to find mouse droppings in your house, you may also start to notice an odor if mice move in with you. Their urine leaves an unpleasant musky scent behind that is most noticeable in enclosed spaces. You may notice this smell in:

Cabinets
Pantries
Closets
Wall voids
Attics
Storage rooms

Odor alone is not enough to identify mice because moisture, mold, or other pests can create unusual smells, but if you notice a scent in combination with another sign, it’s worth pursuing.

Can Your Pets Tell You There Are Mice?

If you have a cat or dog, they may be your best sign of a mouse infestation. Cats and dogs are more attuned to noises and scents than humans, so they might notice an issue before you do. If your pets start:

Staring at one wall or cabinet
Sniffing along baseboards
Pawing at doors or appliances
Becoming unusually alert at night

It may be a sign that mice are present. When you notice your pet behaving in any of these ways, inspect the area for droppings, gnaw marks, or other signs.

Where Should You Look for Hidden Mouse Activity?

Mice like to stay out of the way, so it can be difficult to identify signs of their presence if you don’t know where to look. We recommend checking:

Behind refrigerators and stoves
In storage rooms
Under sinks
In pantries
Inside lower cabinets
In attics
In crawlspaces
Around utility lines
In garages
Along wall edges

Areas with food, warmth, clutter, or easy entry points deserve extra attention, as these are all areas that will attract mice.

Does Seeing One Mouse Mean You Have More?

If you see one mouse in your house, it doesn’t automatically mean that there’s a large infestation. That said, mice are secretive, so one sighting may indicate additional activity that has gone unnoticed. By checking routinely for the signs listed above, you have the best chance of identifying an infestation in its early stages. Finding multiple signs usually means more than one mouse is in your house.

What Should You Do If You Notice Signs of Mice?

If you’ve seen signs of mice in your house, there are several things you should do. First, confirm where the activity appears to be concentrated. Do you only see signs in your garage? Have you found grease marks all along your bedroom walls? Are there droppings in your kitchen cabinets? Knowing this information can help you determine if the problem is widespread.

In addition to determining the scope of the problem, you’ll also want to take some steps to reduce the things that attract mice. Making it harder for them to access food, water, and shelter in your house won’t get rid of an active infestation, but it won’t hurt either, and it can help prevent future issues.

Take these prevention steps:

Secure pantry food and pet food in sealed, hard-sided containers
Clean crumbs and spills
Close garbage containers with tightly fitting lids
Reduce clutter and store items in plastic tubs instead of cardboard boxes
Inspect for exterior entry points and seal the ones you find

You’ll also need to take steps to eliminate the mice in your house.

When Should You Call Pest Control for a Mouse Problem?

Should you try to get rid of mice on your own or does it make more sense to get professional rodent control? It depends. If you think a single mouse has gotten into your house, DIY mouse control may be all that’s needed. Professional help may make sense when:

Droppings appear repeatedly
Scratching noises continue night after night
Gnaw damage is increasing
Activity is present in attics, crawlspaces, or wall voids
You can’t identify where mice are entering
DIY trapping has not resolved the problem
Multiple rooms show signs of activity

A pest professional can help identify how mice are getting in, where they’re spending time, what conditions are contributing to their presence, and what the most appropriate control and exclusion measures are for an effective solution.

Stop a Mouse Problem Before It Gets Worse

There are plenty of signs of a mouse infestation that don’t include seeing a live mouse. These include:

Droppings
Gnaw marks
Nighttime noises
Grease marks
Nesting materials
Odors
Unusual pet behavior

If you see any of these signs, don’t wait until you see a live mouse to investigate. The sooner you identify a mouse infestation, the sooner you can get rid of it. Since mice are destructive and spread diseases, the sooner you eliminate them from your house, the better!

For multiple or repeated signs of mice in your Rutherford County home, get in touch with All-American Pest Control. We offer FREE home evaluations that can help you confirm mouse activity, identify entry points, and determine the appropriate next step. Contact us today for a mouse-free home.

Comprehensive Pest Control Solutions in Nashville, TN & Nearby Neighborhoods

Since 1961, All-American Pest Control has been your go-to team of trusted pest experts for homes, businesses, and home builders throughout Nashville and Middle Tennessee. Our expert team offers termite treatments, mosquito reduction, rodent removal, ant and spider control, and wasp nest removal—keeping your property protected year-round. As a local, family-owned company, we take pride in offering reliable, professional pest solutions with outstanding customer service.

We proudly serve: Arrington, Christiana, Lascassas, LaVergne, Nolensville, Readyville, Rockvale, Smyrna, Barfield, Murfreesboro, Blansett Meadows, Deerfield, Fairfield Estates, Scottland Acres, Steeplechase Meadows, Stones River, Walterhill, Eagleville, Milton, as well as the entire Rutherford County and Greater Murfreesboro areas.

For trusted pest control in Nashville, TN, and these surrounding communities, contact All-American Pest Control today! Call (615) 824-8814 or Schedule a Free Consultation online.