You find the clue beneath the kitchen sink: a torn corner on a paper bag, a few dark specks, or the unmistakable work of a very small tenant who has not offered to help with utilities.
Dad says the mouse is gone. He may be right. He may also mean he has not seen it since Tuesday, which is not quite the same thing.
This is not a referendum on whether he can keep his house. Mice enter tidy houses, busy houses, quiet houses, and houses where someone used to notice every loose bag of crackers before anyone else did. The question in front of you is smaller: what kind of help will find the route in, deal with what is already inside, and leave Dad with a plan he can actually maintain?
When you compare pest-control services, do not compare only the first visit. Follow the work from the first clue to the final check.
Begin with what Dad has noticed
Ask him where he saw the mouse or its signs. Keep your voice ordinary. You are collecting a route, not building a case against his housekeeping.
Look together beneath the sink, behind the stove if it can be checked without straining or disconnecting anything, beside the refrigerator, near pet food, along basement walls, and around stored birdseed or grass seed. Notice chewed packages, nesting material, droppings, or gaps around pipes.
Ask when he first noticed something and whether the signs appeared in more than one room. If he has already placed traps or bait, find out where. Do not move or add products until you know what is there, especially if children, pets, or visiting grandchildren enter the house.
Dad may insist that one heroic trap settled the matter. Give the trap its due. Then explain that you want to know how the mouse got in, because you would rather not keep hosting its cousins.
Compare the inspection, not the company description
A useful first question is, "What will you inspect before recommending treatment?" Listen for a clear route through the house rather than a promise made from the kitchen doorway.
Ask whether the person will inspect the kitchen, pantry, basement, garage, utility penetrations, foundation edges, doors, and other likely entry points. If the attic or roofline might be involved, ask whether that area is included and how it will be reached safely.
Find out whether the inspection covers only mice or also checks for signs that point to a different animal or insect. You do not need a dramatic list of everything that could possibly live in Missouri. You need the provider to identify what the evidence in Dad's house actually supports.
Ask how findings will be shown to you and Dad. Photos are useful when an opening is behind an appliance, high on an exterior wall, or in a crawlspace neither of you plans to visit. A written list of locations is better than "We found a few spots."
Also ask who performs the inspection. Will it be the same person who recommends the work? Will a different crew do the sealing? If so, how will the findings travel from one person to the next?
Make the plan name all three jobs
A complete proposal should separate three jobs: dealing with mice already inside, removing food and shelter opportunities, and closing entry points.
For the mice already inside, ask what will be placed, where it will be placed, and who will check it. Find out whether Dad is expected to empty traps, watch bait stations, or call when something changes. If he wants no part of that job, say so before agreeing to the service.
For food and shelter, ask what the company expects Dad to change. Specific requests are workable: move birdseed into a lidded container, stop leaving pet food out overnight, or clear cardboard from one wall. "Clean the basement" is not a plan. It is a sentence large enough to ruin everyone's Saturday.
For entry points, ask which gaps will be sealed, what material will be used, and whether doors, vents, pipe openings, and foundation gaps are included. Foam alone may not be the whole answer in places an animal can chew. The provider should be able to explain why the chosen material fits each opening.
Do not assume that "exclusion," "proofing," or "repairs" includes every gap found during the inspection. Ask for the actual locations in writing.
Find out where the service stops
Two companies may describe similar plans while taking responsibility for very different pieces of the work.
Ask these questions of each provider:
Will you move the stove or refrigerator if inspection behind it is needed? Will you seal openings, or only point them out? Does the work include the garage and attached storage areas? Who removes trapped animals? Who disposes of contaminated nesting material? Will you clean small affected areas, or must another company do that? If carpentry, masonry, roofing, or appliance work is needed, will you identify the exact repair for the next contractor?
Ask what is excluded. Chimneys, roofs, detached sheds, crawlspaces, insulation, and damaged food may sit outside the ordinary visit. An exclusion is not automatically a problem. An unnamed exclusion becomes one when everybody assumes somebody else handled it.
Compare follow-up by the trigger, not the number of visits
A return visit matters only if you know what happens during it.
Ask when the provider returns, what will be checked, and what evidence changes the plan. Will traps be moved if activity continues? Will sealed openings be reinspected? Will the technician look for new signs in rooms that were quiet before? What should Dad report between visits, and whom should he call?
Find out what happens if signs return after the work appears finished. Ask whether the company returns to inspect, whether repair work is treated differently from trapping, and what conditions would place new work outside the original agreement.
Dad may prefer the company that promises to be done fastest. You can respect that preference while asking one more question: "How will we know you are done?" A good answer describes evidence, not confidence.
Fit the service to Dad's actual household
The best plan on paper can fail if it expects Dad to do work he will not do.
Tell each provider about pets, visiting children, locked rooms, hearing difficulties, mobility limits, or a basement Dad avoids. Ask how traps or bait stations will be placed so they are not underfoot and cannot be reached by the wrong hands or paws.
Decide how technicians will enter the house. Will Dad answer the door? Will you attend? Does the company give an arrival window and identify the technician? Ask Dad before putting your phone number on everything. It is still his house, even if his preferred scheduling system is "They can come whenever, unless I am out."
Choose one person to receive visit notes. Keep the inspection findings, service plan, product information, and follow-up instructions together. Write down what Dad agreed to do and what the provider agreed to do.
What to do tonight
Do not begin pulling appliances, climbing ladders, or scattering new products around the house.
Put opened dry food, pet food, birdseed, and snacks into sturdy closed containers. Throw away food with chewed packaging or visible contamination. Wipe ordinary food spills with household cleaner.
If you find droppings or nesting material, keep Dad and pets away from the area until you can follow appropriate cleanup guidance. Do not sweep or vacuum dry material into the air. If the amount is extensive, if it is inside heating equipment, or if you cannot reach it safely, leave it for someone equipped to handle it.
Photograph the clues and write down the rooms where you found them. Check whether Dad already has traps, bait, or poison in place. Keep packaging or photograph the labels so a provider can see exactly what has been used.
Then make the kitchen usable for breakfast. Clear one counter, close the food containers, and leave the bigger investigation for daylight.
When to ask the doctor
Contact Dad's doctor or another appropriate health professional if he is bitten or scratched, has direct contact with droppings or nesting material and then feels unwell, or develops new breathing trouble after cleanup. Tell them what happened and when, including any cleaning products or pest-control products involved.
If anyone may have swallowed or mishandled poison or bait, use the emergency instructions on the product label and contact the appropriate poison help service promptly. Keep the package nearby so you can report the product accurately.
You are not asking the pest-control technician to judge Dad's health, and you are not asking the doctor to inspect the basement. Give each person the part of the problem that belongs to them.
The good-week card
Add one line: "We know who checks the traps, who seals the gaps, and what Dad should report."
That is a good week. Not because the house has become a fortress, and not because Dad admitted you were right. The kitchen is usable, the work has an owner, and the next small clue will not have to become a family mystery.