Open country is never far from Billings. Irrigation ditches run through the valley, wheat and hay fields line the edge of the city, and cottonwoods shelter the Yellowstone River bottoms. All of that supports a lot of small rodents, and when the weather turns cold, a fair number of them come looking for a warm shelter. A heated garage, a crawlspace or the wall cavity behind a kitchen cabinet fits the bill.
PestMinistry is a referral service. We connect callers with independent, licensed rodent control providers. We do not trap or exclude rodents ourselves.
Species and risk
- Deer mice have white bellies and large eyes and are common in sheds, barns and outbuildings. In the western states they can carry hantavirus, so cleanup should be done carefully.
- House mice live inside homes year-round and breed constantly given food and warmth.
- Voles tunnel through lawns and gardens, mostly an outdoor issue, though they can chew landscaping and plants.
- Norway rats are less widespread than in coastal or eastern cities but can occur near farms, grain storage, and restaurants.
- Pocket gophers and ground squirrels damage yards and are typically handled as wildlife or landscape pests.
Why they come into houses here
Billings subdivisions in the Heights and on the west side often back onto open space, irrigation corridors or farmland. Mice use these edges as travel lanes. After harvest, field food disappears and they relocate. Older houses have rock foundations and worn weatherstripping, while newer homes can still have gaps around plumbing, vents and garage door corners. Heavy snow insulates foundations, which lets mice move about unseen under the white blanket.
Handle droppings the safe way
- Ventilate the room for at least half an hour before cleaning.
- Wear rubber gloves and a respirator made for fine particles when contamination is heavy.
- Spray droppings and nesting material with a disinfectant or bleach solution and let it soak.
- Wipe up with paper towels and bag everything for the trash.
- Do not sweep or vacuum dry material, which can send particles into the air.
Professional removal and exclusion
A licensed provider will check the exterior and attic, garage and basement for entries, then use snap traps and, where appropriate, secured bait stations to reduce numbers. The permanent fix is exclusion: stuffing steel wool or copper mesh into small openings and covering them with sealant, installing door sweeps, screening vents and repairing damaged siding or soffits. Ask the provider to point out every opening found, because that is the main way to prevent a return.
Prevention
- Keep stored hay, feed and birdseed in rodent-proof containers.
- Pull firewood and debris piles a good distance from the house.
- Mow tall grass near the foundation and trim shrubs.
- Seal gaps larger than a quarter inch around the home.
- Keep garage doors closed when not in use.
- Clean up fallen fruit and spilled pet food outside.
Contact
For a referral to a licensed provider, call (844) 725-1661. We serve homeowners and businesses in Billings.
Frequently asked questions
When are mice worst in Billings?
From late September through winter, when cold nights drive them inside.
Can mice chew through walls?
They can gnaw through drywall, wood and some foam, but they prefer to squeeze through existing gaps.
Is hantavirus a real concern?
It is rare, but it is a good reason to treat heavy deer mouse contamination with care and use proper cleanup methods.
Why do traps work for a week and then stop catching?
Trapping can remove the visible population, but unless entries are sealed, new mice arrive.