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Rodent Control
Every rodent programme has two halves. One kills what’s inside and lasts as long as the bait does. The other closes how they got in, and that’s the half that ends it.
The short answer
A rodent programme that’s only bait and traps is a subscription. Rodents are inside because a gap exists, food is available, or cover is close — and until those change, clearing the current population just makes room for the next. Ask any company what they intend to seal and with what, and treat “quarterly bait station servicing” with the scepticism it deserves as a standalone plan.
Permanent part
Exclusion
Mouse gap
About a pencil
Rat gap
About a quarter
Bait risk
Secondary poisoning
Mice or rats?
They need different gap sizes, different traps and different strategies. Getting it wrong wastes weeks.
Most common
Mice
Droppings the size of rice grains, gnawing in cupboards and packaging, activity in kitchens and voids. Squeeze through a gap around a pencil’s width and breed fast enough that a small problem is a large one within a season.
Bigger job
Rats
Droppings the size of olive pits, runs along walls, gnawing on hard materials. Need a gap around a quarter’s width, range further, and are far more cautious about new objects.
Changes the approach
Both, or unclear
Rats will displace mice, so finding both usually means a recent change. Worth having identified rather than assumed, because trap placement differs.
Not rodents
Squirrels or birds
Noise in the roof during daylight, larger droppings, scratching rather than scurrying. Wildlife work, with different legal constraints.
The neophobia difference
This is the single most useful thing to know about trapping, and almost nobody mentions it.
Rats are neophobic. New objects in a familiar environment are avoided, sometimes for days. Set traps and get nothing for a week and the assumption is that they’re not working — when in fact the rats are simply routing around them. Experienced operators leave traps unset for several days first so they stop being novel.
Mice aren’t. They investigate new things readily and will usually go to a well-placed trap within a night or two. If mouse traps sit empty for a week, the placement is wrong rather than the timing.
Same equipment, opposite expectations. Judging a rat programme on the first few days is how people conclude a working plan has failed.
The order that works
Reverse any of these and you get the outcomes everyone complains about.
Remove the food
Pet food, bird seed, compost taking cooked scraps, fallen fruit, an overflowing bin. Unglamorous, and the only part that stops it recurring.
Clear the cover
Woodpiles off the ground and away from walls, ivy cut back, stored material lifted. Rodents cross open ground reluctantly.
Find the entry points
Ground level first, then roofline — rats climb well. Utility penetrations, under garage doors, deck-to-foundation junctions, soffits.
Seal with the right material
Copper mesh or stainless wool packed tight and sealed over, or hardware cloth. Steel wool alone gets pulled out; expanding foam is a draught seal, not a barrier.
Then trap, indoors
Snap traps against walls on the runs. You recover the body — with bait you don’t, and it dies wherever it happens to be.
Check daily
For welfare and because an unchecked trap stops being control and becomes a smell.
Mice against rats
Where this stops being a DIY job
Activity inside a wall, ceiling or floor void. Don’t seal the building while a population is inside it — they die in the cavity or chew their way somewhere worse. The interior has to be cleared before the envelope closes.
Droppings or nesting material in an enclosed, poorly ventilated space. Dried material shouldn’t be dry-swept or vacuumed in a confined area — that puts dust into the air you’re breathing. There is an established protocol and equipment for this, and it’s the part most worth handing over.
Roofline entry points. Rats climb, so many real entries are at soffit height. Ladder work with one hand occupied is where the injuries in this job come from.
What a real programme includes
Surveys
Works the outside
Most of a competent visit happens on the exterior, finding how they get in.
Seals
Names the material
Copper mesh, hardware cloth, mortar. If the answer is foam, it isn’t exclusion.
Advises
Says what to change
Feeders, bins, woodpiles, ivy. A programme without that is a subscription.
Common questions
Why do rodents keep coming back?
Because the entry point is still open and the attraction is still there. Clearing the current population without exclusion just makes room for the next.
How small a gap can a mouse get through?
Roughly the width of a pencil. Rats need about a quarter’s width. Both will enlarge an existing gap rather than starting from nothing.
Why aren’t my rat traps catching anything?
Rats avoid new objects for days. Experienced operators leave traps unset at first so they become familiar, then set them. Mice have no such caution — empty mouse traps mean bad placement.
Is rodent bait safe around pets?
Anticoagulants remain active in the animal that ate them, so a poisoned rodent is a risk to a cat, dog, owl or fox that takes it. That’s a real argument for traps in a residential setting.
Something in a wall, or droppings in a confined space?
Clearing food and cover, and sealing what you can reach at ground level, is genuinely yours and it’s the half that lasts. A population already inside the structure, roofline entry points and contamination clean-up in an enclosed space are where this stops.
Call (877) 360-4657