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A Good Housekeeping report says falling temperatures and reduced outdoor food can lead mice to move indoors in autumn. Pest expert Ed Dolshun says this is a familiar seasonal pattern, not proof that mouse numbers are unusually high this year. Food, nesting materials and small gaps can make homes more inviting; persistent signs warrant professional advice.
Cooler autumn weather and diminishing food outdoors can prompt mice to move into homes in search of warmth, food, water and shelter, according to pest expert Ed Dolshun, quoted in a Good Housekeeping report. The seasonal shift can make signs of mice more noticeable, but Dolshun said it does not by itself show that mouse numbers are unusually high this year.
“Mice don’t hibernate. They relocate,” said Dolshun, vice president of business development and technical director at Catchmaster. He described the autumn movement indoors as a recurring pattern that happens each year, while noting that local conditions can make activity seem worse in some years than others. The report provides no population data or measurement showing an overall increase in mice this fall.
Food can be available in small amounts across a home. Dolshun said mice nibble 15 to 20 times a day, making crumbs, open food packets, pet food, spilled birdseed and uncovered rubbish potential attractants. Garages may also draw mice when seed or pet food is stored there; animals can then travel into the house at night.
Common signs include small, dark droppings, gnawed food packaging, shredded paper or fabric, greasy marks along walls and pipes, and scratching after dark. Dolshun described droppings as rice-like grains with pointed ends, around 3 to 6 millimeters long. The report advises checking beyond the kitchen, including garages, cupboards, attics and storage areas.
How Small Gaps Become Entry Routes
Mouse signs can point to a problem beyond the place where they are first noticed. Food stored in a garage, clutter in a quiet cupboard or an opening around a pipe may offer a route or resource, so checking only the kitchen can miss the source. Identifying and addressing those conditions may help limit access to food and shelter.
The report recommends putting opened food in sturdy sealed containers, cleaning up crumbs and spills, securing rubbish, and storing pet food and birdseed where mice cannot reach them. It also advises reducing piles of cardboard and other clutter that could provide nesting material or undisturbed hiding places. These are practical steps, but they are not a guarantee that mice are absent.
Repeated fresh droppings, continuing scratching or mice seen during daylight are reasons the report gives for contacting a pest-control professional. In flats and shared buildings, residents should also tell a landlord or building manager, because a route may involve a shared wall or another part of the property.
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A Familiar Autumn Movement Indoors
The report frames autumn sightings as a seasonal pattern rather than evidence of a new outbreak. As temperatures fall and outdoor food becomes less available, mice may relocate indoors. Dolshun said the pattern recurs each autumn, while differences in local conditions can affect how noticeable it is.
Early evidence may be indirect: droppings in a cupboard, small holes in food packaging or scratching noises at night. Mice are nocturnal, according to the report, so people may find traces of activity without seeing an animal. Where food or nesting materials are stored can help explain why signs appear in one part of a property while the likely attractant is elsewhere.
“Mice don’t hibernate. They relocate.”
— Ed Dolshun, vice president of business development and technical director at Catchmaster
No Count Confirms a Bigger Year
The report does not provide counts, survey results or a comparison with previous autumns to establish whether there are more mice overall this year. Dolshun said the seasonal movement is familiar and that local conditions can make one year feel worse, but the source gives no specific local data or explanation for particular neighborhoods.
Droppings, gnaw marks and noises can indicate activity, but they do not by themselves identify an entry point or show how many mice are present. The report does not give a standard timeframe for judging whether activity is persistent; property-specific assessment may be needed if signs continue.
Check, Seal and Seek Advice
The report recommends checking food storage, rubbish, pet-food bowls and birdseed, then inspecting garages, cupboards and other storage areas for signs or potential access points. Small openings around pipes, cables, doors, windows and rooflines may provide entry. It suggests using a pencil-width check to help spot gaps and sealing suitable openings with mouse-resistant material.
Air vents and air bricks should not be blocked, the report cautions. For a large or awkward opening, it advises asking a pest-control expert or tradesperson. If fresh droppings keep appearing, scratching continues or mice are seen during the day, contact a pest-control professional; residents of shared buildings should notify their landlord or building manager.
Key Questions
Are there definitely more mice this fall?
No increase is confirmed by the report. It describes autumn movement indoors as a recurring pattern, and provides no data comparing mouse numbers this year with previous years.
Why might mice enter a house in autumn?
According to pest expert Ed Dolshun, falling temperatures and reduced outdoor food can lead mice to seek warmth, food, water and shelter indoors.
What are common signs of mice?
Look for small dark droppings, gnawed food packaging, shredded paper or fabric, greasy marks along travel routes, and scratching noises after dark.
What can make a home less attractive to mice?
Store food, pet food and birdseed in sturdy sealed containers; clean up crumbs; secure rubbish; and reduce clutter that could provide nesting material. Check for openings without blocking vents or air bricks.
When should I contact a professional?
The report advises contacting a pest-control professional if fresh droppings keep appearing, scratching continues or mice are seen during the day. In a flat or shared building, notify the landlord or building manager as well.
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