Black droppings, foul odors, and scratching sounds don’t just happen at Halloween.

They can also mean a rat or mouse infestation in your home.

Rodents can be tricky, often only coming out at night.

Signs of a Rat or Mouse Infestation in Your Home

The Spruce

The Spruce

If you see any of these signs you have aratormouseinfestation.

Here are some foolproof ways to tell whether there are still any mice or rats in your home.

As rat andmouse droppingsage, they dry out become gray, and crumble if touched.

mouse droppings

The Spruce / Adrienne Legault

The marks can also indicate whether you have rats or mice.

If you had a mouse infestation but now see larger gnaw marks, you may now haverats.

It is most likely to occur when rodents have recently entered a structure.

gnaw marks in drywall

The Spruce / Adrienne Legault

Tracks or runways can be detected with a flashlight or blacklight held at an angle toward the suspected area.

Place a light layer of flour or baby powder on the area.

If the rodents are active, you will see their footprints in the powder.

cat smelling under stove

The Spruce / Adrienne Legault

The nest will be hidden but close to food and water sources.

If you see gnawing or droppings, the nest is close by and must be removed.

You might even hear muffled squeaking.

sprinkling baby powder to identify rodent pathways

The Spruce / Adrienne Legault

Urine Pools

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Rats and mice leave urine everywhere.

Find the urine pools using a black or fluorescent light during your inspection.

Adead mouse odoris unforgettable because it permeates the area with a sharp and pungent smell.

rodent nest

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The animals' fur and droppings could be the problem.

Identifying Mice vs.

Rats

For the most successful elimination of a rodent infestation, determine whether you havemice or rats.

mouse scurrying

The Spruce / Adrienne Legault

Mice are curious and will investigate anything new.

Rarely, will homes have over 10 mice or rats.

Food, water, and shelter are the main attractions for mice and rats.

Illuminated black light with from a ultraviolet flashlight

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Keep your house clean, eliminate clutter, keep foodstuffs in sealed containers, and empty the garbage often.

They often hide in walls, under appliances, and at the base of cabinets.

How Do I Manage Mice and Rats?New York State Integrated Pest Management.

Cat looking at two white mice behind wall

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University of Kentucky Cooperative Extension Service.

rat in house

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