Start with accessible gaps
From ground level, look around utility penetrations, basement windows and doors. Record damaged seals or daylight at a closed door. Do not seal a vent, flue or drainage opening without understanding its purpose. Repairs must preserve the building's safety and ventilation.
Remove easy food sources
Store pet food and bird seed in sturdy containers with fitted lids. Clean spilled seed and food scraps, including garage storage areas and grills. Keep garbage secured. A closed kitchen cupboard is not enough if a mouse can reach an open bag inside.
Keep inspection routes visible
Reduce clutter along accessible walls so fresh signs are easier to spot. Check stored items before bringing them indoors. Keep firewood and yard storage arranged so you can see what is around them without reaching into hidden spaces.
Treat exclusion as part of a plan
Closing a gap is not the same as confirming that all animals have left. If activity is ongoing, ask how removal and sealing will be coordinated. New droppings, new gnawing or repeat sounds after treatment are reasons to follow up rather than add more products at random.
Know when to ask for an inspection
Repeated indoor activity, uncertain species or inaccessible areas warrant professional assessment. If you rent, bring the record to your property manager. Confirm whether the provider handles structural exclusion or only pest treatment before booking.
Regional reference: Michigan DNR: small rodents.
Return to rodent help for Ann Arbor or check contact availability.