Signs of rodent infestation
Oct 14

7 Signs of a Rodent Infestation You Shouldn't Ignore

Oct 14

Rodents are more than just an inconvenience—they can cause real harm if left unchecked. They chew through wiring, nest in insulation, and spread diseases through droppings and urine, creating health risks for your family. Recognizing the signs of a rodent infestation early can save you from severe damage and rising repair costs.

By identifying and addressing rodent issues promptly, you can protect your home from the worst effects of an infestation.

Table of Contents

1. Rodent Droppings

Identifying rodent droppings is one of the earliest and most telling signs of rodent infestation. Both rats and mice leave droppings, which differ in size and shape, offering clues to the type of pest you're dealing with. 

Mouse droppings are small, about 1/8 inch to 1/4 inch in length, and have pointed ends, while rat droppings are larger—typically over 1/2 inch—with blunt ends. These droppings are commonly found near food sources, in cabinets, or under sinks.


Recognizing these droppings early can help you stop an infestation before it gets out of control. If you suspect rodent activity, products like Evolve Rodent Birth Control offer a safe and humane way to reduce rodent populations.

2. Gnaw Marks and Chewed Materials

Before you can develop successful pest management strategies, you need to know how to recognize the behavioral differences between deer mice vs. house mice. Each species exhibits unique habits that influence how they interact with their environments and the people within them.

Rodents have a constant need to gnaw, which often results in significant property damage. Gnaw marks are a common sign of rat infestations or mice infestations. You might notice chewed wiring, wood, or food packaging in your home. This behavior helps keep their teeth from growing too long, but it can also lead to dangerous situations like electrical fires. 

Inspecting your home for these signs of mice infestation can help catch the problem early. 

3. Unusual Noises: Scratching, Scurrying, and Squeaking

Hearing strange sounds at night, such as scratching in the walls or scurrying in the attic, can be one of the first signs of a rodent infestation. Mice and rats are most active after dark, and their movements within walls, ceilings, and floors can be quite noticeable. In some cases, you might also hear squeaking as rodents communicate or move about. These noises, especially when frequent, indicate it's time to take action.

 

Signs of mice infestation

4. Rodent Runways and Tracks

Rodents often follow the same paths repeatedly, creating visible rodent runways. These well-worn paths may show greasy smudges along walls, baseboards, or furniture, as well as tracks made of footprints or tail marks. You can spot these runways in hidden areas like attics, basements, or under kitchen cabinets. Identifying these tracks early is crucial for addressing an infestation before it spreads.

5. Nesting Materials and Holes

Rodents build their nests using materials like shredded paper, fabric, and insulation. Discovering these nesting materials in hidden or dark areas like attics, basements, or behind walls is a strong sign of a rodent infestation. Additionally, rodents often chew holes in walls, floors, or baseboards to create entry points for their nests. Spotting these small openings alongside nesting debris is a clear indication that rodents may be multiplying in your home.

6. Foul Odors and Allergens

A strong, musky odor in your home could be a sign of a rodent infestation. As rodents move through your house, they leave behind urine and droppings, which can create a lingering, unpleasant smell. This odor may be especially noticeable in enclosed spaces like attics, basements, or under appliances. Additionally, rodent droppings and urine can trigger allergies and asthma, making it important to act quickly once you notice these signs of a rodent infestation.

7. Damaged Food Packages and Hoarded Food

Rodents are known for gnawing through food packaging in search of sustenance. If you notice bite marks or torn packaging in your pantry, it’s a strong sign of a rodent infestation. Mice and rats will chew through plastic, cardboard, and even aluminum to access food. Additionally, rodents tend to hoard food in hidden areas, such as behind appliances or in attics. This behavior  contaminates your food supply and also provides evidence of a growing infestation.

FAQs About Rodent Infestations 

No one wants to deal with a rodent infestation, but knowing the signs can help you prevent one from getting out of control. To help, we have answered a few of the most common questions we hear.

How do rodent infestations affect my health?

Rodents can spread dangerous diseases such as Hantavirus, Salmonella and Leptospirosis through their droppings, urine, and saliva. If left untreated, these diseases can cause serious health risks, particularly in homes with vulnerable individuals. This underscores the importance of addressing signs of rodent infestation quickly​.

Why do rodents chew on electrical wires?

Rodents chew on electrical wires to manage their constantly growing teeth. This gnawing

behavior damages property and also poses a significant fire hazard due to frayed wires. It's critical to take action when spotting gnaw marks to prevent further damage and potential fires​.

Can rodents infest my car or garage?

Yes, garages and vehicles are common targets for rodents, especially during colder months. Rodents seek warmth and can chew through car wiring or create nests in engine compartments. Regular checks for signs of mice infestation or rat infestation in these areas can prevent costly damage​.

How can I prevent a rodent infestation from recurring?

To prevent recurring infestations, seal all entry points, such as cracks and gaps around your home. Store food in airtight containers and eliminate nesting materials like paper or fabric. Regularly inspecting your property can help you catch early signs of rodent infestation, allowing for quick intervention​.

Are rodent infestations more common during certain seasons?

Rodent infestations are more common in fall and winter when rodents seek shelter indoors. However, they can also occur year-round if conditions are favorable. Staying vigilant for signs of a rodent infestation throughout the year can help mitigate potential problems​.

Trust SenesTech to Help You Stop Rodent Infestations

Protecting your home from rodent infestations requires early action and reliable solutions. SenesTech® offers innovative products like Evolve Rat™ and Evolve Mouse™ Birth Control, designed to humanely reduce rodent populations over time. These solutions focus on fertility control, ensuring that rodents don’t continue to breed and spread within your home.

Don’t wait for an infestation to get out of control. Explore our offerings to see how you can safeguard your property with ethical, long-term rodent control.