8 Signs You May Have Mice

Strange scratching or scrabbling noises in the walls, especially at night, are another sign of mice. Mice are excellent climbers and jumpers, and are capable of fitting through openings much smaller than their bodies; they can use the spaces in between joists to travel from one part of the house to another. Mice are typically nocturnal, so you will probably hear them only at night.

Related: 7 House Sounds You Never Want to Ignore

If you find unexpected holes, tears, or signs of gnawing in bedding, clothing, insulation, fabrics, or other materials, it is a good bet that mice are present. Mice use shredded materials to build nests, which are usually located in dark corners, drawers, cabinets, or storage boxes, or behind fridges and other large, seldom-moved appliances. Mice will often chew small holes in the bottom of drawers, cabinets, and furniture and fill the holes with shredded material.

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Mice have teeth that grow continuously, so they need to gnaw on hard, inedible materials, including wood, plastic, cables, and electrical wiring, to wear them down. This makes mice a serious fire hazard, as they can chew through shielding and wiring, which can cause shorts, power outages, equipment damage, or fire.

Related: 8 Warning Signs of Dangerously Outdated Electrical Wiring

One adult mouse can consume between three and four grams of food per day, and mice like many of the same foods we do: cereals, grains, seeds, nuts, fruits, meats, chocolate, and candy. Mice especially like foods that are high in fat, such as bacon, cheese, and butter. They'll make up to 30 visits a day to an identified food source, such as a pantry or cupboard. Strange holes or tears in packages are indications that mice may be raiding your pantry. If you think you've been sharing food with mice, throw it away—food that has been contaminated by mice may cause dangerous illnesses in humans, including salmonella, hantavirus, and fever.

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Finding a dead mouse in the house—or, heaven forbid, seeing a live one—is a sure sign that you have a problem. Seeing a mouse out and about during the daytime can indicate a particularly heavy infestation, one that might require the services of a trained pest-control professional to eradicate.

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