What are skunks, and what makes them a problem here?
A skunk under the deck is one of those problems that stays quiet right up until it doesn’t. The striped skunk (Mephitis mephitis) is a cat-sized member of the weasel family, black with the familiar white stripe, and it is built for exactly the life it lives in rural Northeast Wisconsin: a slow, nearsighted, ground-dwelling digger that forages at night, dens in sheltered cavities, and carries a chemical defense potent enough that most predators — and most homeowners — learn to leave it alone. It is not aggressive and it would rather waddle away than confront you. The trouble is what happens when it can’t: a cornered or startled skunk sprays, and a skunk denned under your deck or shed is a rabies concern, a flea-and-tick reservoir, and, in spring, almost always a mother with a hidden litter.
Skunks thrive in the patchwork that defines this region — woodlot edges, fence lines, old fields, grub-rich lawns, and the crawl spaces under the area’s countless decks, porches, sheds, and farm outbuildings. They don’t climb into your attic the way a raccoon does; they work at ground level, and the void under a low deck or a shed on skids is, to a skunk, an ideal den: dark, dry, protected on all sides, and easy to dig into. A skunk that settles under your porch didn’t pick it at random. It found the safest cavity in its range with food close by, and around here that food is often the same white grubs chewing up your lawn.
Because BugBoss does both pest control and wildlife removal, we handle skunks as a complete job — the animal, the den, and the mess — instead of bouncing you between a trapper who takes the animal and leaves the hole open and a handyman who seals the hole with a litter still under it. With skunks that coordination matters, because the two most common ways a skunk problem goes wrong are trapping without sealing and sealing without removing.
Wisconsin biology and the denning cycle
Almost everything a skunk does around your home tracks the breeding calendar, and once you see the calendar the pattern of calls makes sense.
Skunks breed in February and March. After a gestation of roughly nine weeks, kits are born from late April into early May, typically four to seven in a litter. The pregnant female’s search for a safe, defensible place to give birth is what drives her under decks, porches, sheds, and slabs in early spring — a ground-level cavity that stays dry and holds a little warmth is exactly what she’s after. The kits stay under the den for weeks, nursing and growing. They can produce spray by about three weeks old, and they begin following the mother out on foraging trips at six to eight weeks, which is often the first time a homeowner sees a parade of little skunks crossing the yard at dusk and realizes what’s been living under the deck all along.
This spring litter is the single most important fact about skunk work, because it’s what makes the obvious do-it-yourself fix backfire so badly. Wait for the skunk to leave at night and plug the hole, and if a litter is under there you’ve just sealed kits in to die — a decomposition-and-odor problem far worse than the skunk. Trap and haul off the mother and you’ve orphaned a litter that starves underneath. A skunk job done in spring has to account for the young, every time.
Skunks are not true hibernators. Through a Northeast Wisconsin winter they enter torpor — a state of reduced activity and lowered metabolism — and hole up in a protected den, sometimes several females denning communally, living off the fat they built up in fall and emerging on milder days. Males roam more, especially as breeding approaches in late winter. That winter denning is why a skunk under your deck in January is common, and why it so smoothly becomes the spring maternity den.
They are omnivores and opportunists, and their diet is the other half of the story. Skunks eat insects, grubs, earthworms, small rodents, eggs, carrion, fallen fruit, garbage, pet food, and spilled birdseed. In this region their signature behavior is grub digging: pushing the nose into turf and excavating small, cone-shaped divots to reach the white grubs (the larvae of Japanese beetles, June beetles, and chafers) feeding in the root zone. A lawn full of grubs is a nightly feeding ground, which is why grub-rich turf and skunk problems go together, and why treating the grubs is part of a real fix.
A word on the spray, because it’s the thing everyone asks about. A skunk’s scent glands sit at the base of the tail and hold enough of the sulfur-based compounds — thiols — for several accurate shots out to around ten to fifteen feet. A skunk telegraphs before it fires: it stamps its front feet, raises its tail, and, in the spotted skunk’s case, may even do a handstand. Striped skunks give you that warning, but they’re nearsighted and easily startled, so a sudden movement, a loose dog, or a homeowner poking under a deck can trigger a spray with no time to back off. At close range the spray isn’t just foul — it can cause intense, temporary eye irritation, which is a real hazard for a dog that sticks its face into a den.
When are skunks active in Northeast Wisconsin?
Late winter stirs things up. As breeding approaches in February and March, males roam widely and skunk activity — and road-kill — climbs. This is when a skunk that wintered under your shed becomes active again, and when females are settling on maternity dens.
Spring is the peak for den calls. From late April through early summer, a den under a deck, porch, or outbuilding almost always holds a mother and kits. This is the window to get right: a job done while the litter is still in the den is clean; a job done wrong orphans or entombs young. Spring is also when the lawn digging resumes as grubs move back toward the surface.
Summer brings the family’s expanding range as the kits mature and forage with the mother, then disperse to find their own territories by late summer. Garbage, compost, pet food, and gardens all pull skunks in close.
Fall is the second peak for lawn damage — this is when grub feeding is heaviest near the surface, and a heavily infested lawn can get torn up night after night as skunks (and raccoons) work it over. It’s also when animals start looking for a winter den, so this is when they move back under decks and sheds.
Winter is quiet on the surface but not empty underneath. A skunk in torpor under your structure is riding out the cold, and that winter tenant is the seed of next spring’s litter. A musky odor drifting up through a deck or into a crawl space on a mild winter day is often the first sign.
Around Clintonville and the surrounding rural towns, the vulnerability is the sheer number of ground-level cavities: low decks and porches on older village homes, sheds and pole barns on skids, granaries and outbuildings with dug-out gaps at the sill, and slab additions with eroded edges. Pair that with the region’s grub-friendly lawns and open field edges, and skunk work is a steady part of the calendar here, not a novelty.
Local den sites
Skunks den at grade, and on properties around here the same handful of spots come up again and again. The crawl space under a deck or porch is the classic — especially a low deck where the skirt has a gap or the soil has eroded at one corner. Sheds and outbuildings on skids or blocks offer an even easier void, and on farms the pole barn, granary, corn crib, and old milk house all provide sheltered, dug-in dens. Concrete slabs, stoops, and stairs with an eroded or settled edge give a skunk a starting point to dig under. Woodpiles, brush piles, and junk-equipment piles in the yard or at a field edge serve as natural dens. And a skunk will readily expand an abandoned woodchuck burrow — the two animals’ habits overlap, and a skunk moving into a groundhog’s old tunnel under a shed or slab is common.
The tell across all of these is a dug-out entry hole, usually four to six inches across, at the base of the structure, often with a fan of loose soil pushed out and a musky odor hanging around the opening.
Signs of a skunk
Skunks announce themselves in a few unmistakable ways. The odor is first — not necessarily a full spray, but a persistent musky smell around a deck, shed, or crawl space, strongest in the evening and on warm days, that tells you a skunk is denning close by. The cone-shaped lawn divots are second: small, three-to-four-inch dug pits scattered across the turf where the skunk has pushed in for grubs, heaviest in fall and spring and appearing overnight. Third is the den hole itself — a dug-out entry at the edge of a deck, shed, porch, slab, or woodpile, with soil fanned out and, often, matted grass and leaves dragged in as bedding.
You may also find droppings near the den (dark, containing insect parts, seeds, and hair), see the animal itself at dusk or after dark waddling along a fence line or crossing the yard, or — in early summer — spot a line of kits trailing the mother. Tracks show five toes with visible claw marks on the front feet. And on a still spring evening you may hear faint scuffling or squealing from young under the deck. If your dog suddenly won’t leave a corner of the deck alone, take the hint before it gets sprayed.
Are skunks dangerous?
The headline risk with skunks is rabies. In Wisconsin, skunks are one of the primary terrestrial reservoirs of the virus, alongside bats, and a bite or scratch from an infected skunk is a genuine medical exposure that requires prompt attention. This is the reason you never corner, handle, or try to catch a skunk yourself, and the reason a skunk behaving abnormally has to be treated as a possible rabies case. A skunk calmly foraging at dusk is behaving normally. A skunk out staggering in daylight, moving in circles, drooling, unusually bold or aggressive, or seemingly unafraid is not, and that is the animal to keep every person and pet well away from while you call for help. The rabies concern is also why Wisconsin restricts relocation of skunks (more on that below): moving a potentially infected animal to a new area is exactly what the rules are written to prevent.
Skunk dens carry a secondary parasite load that’s easy to underestimate. The bedding under a deck or shed becomes a reservoir of fleas and ticks that fall off the animal, and those can move onto pets and into the home. If you’ve fought a stubborn flea problem that keeps coming back, a wildlife den under the structure is a classic hidden source. The area’s tick pressure is heavy enough already at the woods-and-lawn edge without a skunk seeding your yard with more. Skunk droppings can also carry pathogens and roundworm, so the den debris is not something to sweep out with a broom and no protection.
The spray itself is a minor health matter but a real one at close range — the thiols can cause intense, temporary eye irritation and, for a dog that takes a direct hit to the face, real discomfort and occasional vomiting. It’s overwhelmingly a nuisance, but a face-full is no joke for a pet.
Structurally, skunks do less damage than a raccoon, but the digging isn’t nothing. Repeated excavation under decks, stoops, sheds, and slabs undermines footings and edges, erodes the soil that supports a concrete pad, and enlarges gaps that then let in water, rodents, and the next animal. A skunk den under a structure also tends to become a den under a structure for years running — once the void is open and scented, it invites the next tenant. And the grub digging can shred a lawn to the point of needing reseeding.
Why doesn’t DIY work on skunks?
Homeowners reach for the same handful of skunk fixes, and they fail for consistent reasons — often loudly.
Sealing the hole without removing the animal is the big one, and in spring it’s a catastrophe. Wait for the skunk to leave and plug the gap, and if a litter is under there you’ve entombed the kits, which die and rot in an inaccessible void beneath your deck; if you seal the mother out, the kits starve. Even a lone adult, sealed in, digs frantically, panics, and sprays — leaving you with a soaked, stinking crawl space and an animal to extract anyway. The den has to be confirmed empty, and the young accounted for, before anything gets closed.
Repellents and harassment — mothballs, ammonia-soaked rags, predator-urine granules, blinking lights, radios — are unreliable and short-lived. They sometimes annoy a skunk into shifting for a night, but they do nothing about the open den, so the animal returns or the next one moves in, and a mother will not abandon a litter over a bad smell. Mothballs, incidentally, are a pesticide being used off-label when tossed under a deck, and they contaminate the soil.
Trapping alone ignores the two things that solve the problem: sealing the void and dealing with the young. Trap the adult and leave the hole, and you’ve bought a few weeks before the next skunk finds the same open, scented den. Trap the mother in spring and leave the kits, and they die underneath. And trapping a skunk yourself is its own adventure — the animal sprays in and around the trap, and a nearsighted, cornered skunk in a cage is exactly the wrong thing for an untrained homeowner to be carrying across the yard.
Then there’s the Wisconsin relocation rule, which catches a lot of well-meaning people off guard. Because skunks are a rabies-vector species, the state restricts moving them — a nuisance skunk generally must be released on the same property or euthanized, not caught and dumped in the country somewhere. Hauling a skunk off to “release it in the woods” isn’t just ineffective (it spreads disease and usually just relocates the problem to someone else); it runs against how Wisconsin regulates these animals. Doing it right means doing it within those rules.
Finally, the cleanup — flea-and-tick-laden bedding, droppings, and spray-soaked soil under a structure — is genuinely unpleasant, mildly hazardous work that a shop vac and a garbage bag don’t cover.
The BugBoss removal and exclusion process
We handle skunks as one complete job, in a deliberate order, and the order is the whole point.
Inspect and assess. We confirm it’s a skunk (grub digging and a ground-level den distinguish it quickly from a climbing animal), find the den and every entry under the structure, and — critically in spring — determine whether kits are present. That single determination changes the entire approach, because you cannot seal a den with young inside it.
Remove humanely and legally. We remove the skunk, and any kits, in line with Wisconsin’s nuisance-wildlife rules — including the restriction on relocating rabies-vector species, which means we handle disposition the way the state requires rather than the way that gets someone in trouble. Where a mother and litter are involved, the young are dealt with together with her, never left sealed underneath.
Seal the den — dig-proof. This is what separates a fix that holds from one that fails in a month. We close the void with materials a skunk can’t dig back through: heavy galvanized hardware cloth trenched into the ground and bent outward in an L-shape around the deck, porch, shed, or slab skirt, so an animal trying to dig in hits buried steel and gives up. A skunk is a strong digger; a loose lattice panel or a length of chicken wire tacked to the skirt won’t hold it. Sealing every gap under the structure, not just the obvious hole, is what keeps the next skunk out.
Clean up. We remove the den bedding, droppings, and contaminated material, treat the flea-and-tick load in the den, and address the odor — both the spray and the musky den scent that actively draws the next animal. Left behind, that scent is practically an invitation.
This is core wildlife removal work for us, and because we’re a full-service company we can knock down the fleas and ticks the skunk seeded into your yard, and treat the grubs that made your lawn a feeding ground, in the same visit. For a stubborn skunk-under-the-deck situation, our skunk under the deck walkthrough goes step by step.
The reason we insist on all four steps comes down to how skunk problems recur. Take the animal but leave the void open and scented, and the next skunk — or a groundhog or raccoon — moves into the same ready-made den, often the same season. Seal the void but skip the removal, and you trap an animal that digs, sprays, and dies underneath. Do the removal and the seal but ignore the grubs, and you’ve solved the den while leaving the exact food source that drew the skunk in the first place. A skunk job that actually holds is the one where the animal is out, the den is closed with steel it can’t dig through, the parasites and odor are cleaned up, and the food draw is addressed. Skip any of those and you tend to pay twice.
How do you keep skunks out?
Keeping skunks out comes down to closing the ground-level cavities and cutting the food.
Start with the structures. Skirt every deck, porch, shed, and slab with a buried, dig-proof barrier — hardware cloth trenched down ten to twelve inches and bent outward — rather than a decorative lattice a skunk walks under in a night. Close gaps at the sill of sheds, pole barns, and outbuildings. Fill and screen the eroded edges of stoops, stairs, and slabs where a skunk can start a dig. Keep woodpiles and brush piles up off the ground and away from the house, and clear the junk piles at field edges that make natural dens.
Then cut the food, which is what turns a passing skunk into a resident one. Treat a grub-heavy lawn — this is the big one in our area, because grubs are what bring skunks (and raccoons) onto the turf night after night. Keep garbage in secured, latching cans, bring pet food indoors at night, clean up spilled birdseed and fallen fruit, and manage compost so it isn’t an open food bar. On farms, keep feed in metal containers and screen the outbuilding gaps the same way. None of this evicts a skunk that’s already denning — exclusion is a post-removal and preventive measure, not a way to get a resident animal out.
The same buried-barrier exclusion that skunk-proofs a deck also shuts out groundhogs and denning raccoons, so the work tends to close the whole ground-level wildlife problem at once. Note one legal wrinkle: if bats turn up in the same project, they’re protected in Wisconsin and can’t be excluded during the summer maternity season — that portion follows the DNR timeline even while the skunk work proceeds. We coordinate the two so nothing gets sealed at the wrong time.
When should you call BugBoss about skunks?
Call as soon as you suspect a skunk — a persistent musky odor around a deck or shed, a dug-out den hole with soil fanned out, cone-shaped divots appearing in the lawn overnight, or the sight of a skunk (or a line of kits) crossing the yard at dusk. Call before you try to seal anything, especially in spring, because a den closed with young inside becomes a far worse problem than the skunk. And treat any skunk out staggering in daylight, circling, drooling, or acting unafraid as a possible rabies case — keep your family and pets well back and let us handle it.
In the meantime, keep your distance and keep pets leashed and away from the den — a face-full of spray is the least of what a cornered skunk can do, and the bite-and-scratch risk carries the rabies concern on top of the injury. Don’t poke under the deck, don’t toss mothballs or ammonia under there, and don’t plug the hole to “see if it comes back.” The fastest path to a solved problem is an inspection that confirms what’s under the structure and whether there are young, followed by removal, a dig-proof seal, and cleanup in the right order.
Most pest-only companies serving this area won’t touch wildlife, and most trappers won’t do the exclusion and cleanup that actually keeps skunks from coming back. BugBoss does both, from our base right in Clintonville at 600 S. Main St., so you get humane removal, a dig-proof seal on the den, and cleanup handled together by people you can reach directly. Call 866-BUGBOSS, or request a quote. No long-term contract, no cancellation fee, and you work with Brian, not a call center. We cover the full service area, from Clintonville and Marion to Waupaca, Shawano, and the surrounding rural towns and farms.