A dog came in a couple weeks ago scratching at his collar the whole time we were checking him in, and his owner said what we hear a lot this time of year: "He's just been itchy, I figured it was allergies." We got him up on the table and started the brush-out, and about halfway through his back end we found what we were half-expecting — a scatter of tiny black specks in the coat near the base of his tail. Flea dirt. Not allergies, or not just allergies. That's a pretty normal find at the salon by mid-July.
Why Missouri Summer Is Peak Flea Season
Fleas aren't a once-a-year problem here the way some people assume. According to the American Kennel Club, Missouri's flea and tick risk runs from as early as March through December, and fleas can stay active in any weather above roughly 40 degrees — which in a St. Charles summer is basically the whole season, day and night. There's no single "flea season" start date the AKC or the American Veterinary Medical Association can point to, which is exactly why both organizations recommend year-round prevention rather than treating it as a summer-only concern.
Missouri's humidity makes it worse. Fleas move through an egg-larva-pupa-adult life cycle that can complete in as little as two to three weeks under warm, humid conditions — and a single female can lay dozens of eggs a day. That's how a dog can go from flea-free to a real problem in the space of a couple of weeks if nothing's catching it early.
How Dogs Actually Pick Up Fleas
This surprises a lot of owners: your dog doesn't need to meet another flea-covered dog to get fleas. Fleas live in the environment — shady, humid spots in the yard, under porches, anywhere another animal (a stray cat, a rabbit, a raccoon passing through overnight) has rested — and jump onto your dog the next time they're out there. A fenced backyard in St. Charles is just as likely a source as a trail or a dog park.
What We Check For at Every Groom
Fleas hide in predictable places, and it's part of why we go through the coat by hand and by comb rather than just eyeballing a dog. The spots we look closest at:
- The neck and around the collar line — often the first place activity shows up.
- The base of the tail and lower back — a favorite hiding spot on most dogs.
- The belly and groin, where the coat is thinner and easier to check.
- Behind and inside the ears.
We're not just looking for the fleas themselves, which move fast and can be hard to spot even when they're there. We're looking for flea dirt — small black or dark brown specks that look like flecks of pepper scattered through the coat. It's actually digested blood; if you're not sure what you're looking at, brush a little onto a damp paper towel and it'll turn reddish-brown as it rehydrates. A fine-tooth flea comb pulled through the coat, especially around the tail base and neck, is one of the most reliable ways to catch it during a brush-out.
A dog on a regular grooming schedule gets this check every visit, which matters — the earlier fleas are caught, the easier the problem is to get back under control. If your dog's coat tends to get thick or matted by midsummer, a de-shed or regular bath and brush also means fewer places for fleas to hide undetected between visits.
Signs to Watch For Between Visits
You don't have to wait for a groom to check. At home, watch for:
- Scratching, licking, or chewing that's more frequent or focused than usual, especially around the tail base, belly, or neck.
- Small red bumps on the skin, which can look similar to other insect bites.
- Restlessness or trouble settling, especially at night.
- Flea dirt in the coat, bedding, or anywhere your dog naps regularly.
Some of this overlaps with other summer skin issues we've written about — fleas are one of the more common triggers behind the itch-scratch cycle that leads to a hot spot, so if your dog's dealing with one of those, it's worth ruling fleas out.
What We're Not Able to Do at the Salon
We check for fleas at every groom and we'll always tell you what we find, but we're not vets and we don't treat infestations or diagnose skin reactions. If your dog is showing signs of fleas, has broken skin from scratching, or seems uncomfortable beyond normal itchiness, that's a call to your vet — fleas can also carry tapeworms, and a persistent flea allergy can turn into a bigger skin issue if it's not addressed at the source. A bath at the salon can help physically remove some fleas from the coat, but it won't clear an active infestation or protect against reinfestation on its own.
What Actually Helps
- Ask your vet about a year-round flea preventive. Since Missouri's flea risk runs most of the year, both the AKC and AVMA recommend consistent, vet-approved prevention rather than starting and stopping with the seasons.
- Wash bedding regularly and vacuum spots your dog naps in, since flea eggs and larvae live in the environment, not just on your dog.
- Keep the coat manageable. A long or matted coat gives fleas more places to hide and makes them harder to catch early, at home or at the salon.
- Stay on a regular grooming schedule. Every visit is another close check, on top of whatever you're doing at home.
What We Do at the Salon
Belle, our Weimaraner, has a short coat that makes fleas fairly easy to spot; Blue, our Dachshund, has more coat to check and gets a closer comb-through as a result — it's a good example of why every dog gets checked a little differently depending on coat type. If we find fleas or flea dirt during a groom, we'll always tell you exactly what we found and where, so you know to follow up with your vet before it turns into a bigger problem.
If it's been a while since your dog's last visit, or you want that extra set of eyes checking for fleas this summer, book an appointment here — we're at American Puppy in St. Charles, and we're checking closely all season.
Frequently Asked Questions
When is flea season in Missouri?
Longer than most people think. The AKC puts Missouri's flea and tick risk at roughly March through December, and fleas can stay active anytime it's above about 40 degrees — which covers nearly all of a St. Charles summer. That's why year-round prevention, not just a summer routine, is what vets generally recommend.
Can my dog get fleas without being around other dogs?
Yes. Fleas live in the environment — shady, humid areas of a yard, anywhere another animal has rested — and jump onto a dog the next time they're out there. Your own backyard can be a source even if your dog never interacts with another animal.
What does flea dirt look like?
Small black or dark brown specks scattered through the coat, often near the base of the tail or neck. It's actually digested blood — if you brush some onto a damp paper towel, it turns reddish-brown as it rehydrates, which is how you can tell it apart from regular dirt.
Do groomers check for fleas?
Yes — we check the coat closely at every groom, including with a flea comb, and we'll tell you if we find fleas or flea dirt. We're not able to treat an infestation or diagnose a skin reaction, though; that's a conversation for your vet.
Can a bath get rid of fleas?
A bath can help remove some fleas physically from the coat, but it isn't a full solution and won't prevent reinfestation on its own. A vet-recommended preventive product is the more reliable way to actually get ahead of the problem.
Are fleas dangerous for dogs?
Beyond the itching and discomfort, fleas can trigger flea allergy dermatitis in sensitive dogs and can carry tapeworms. Neither is something to try to manage at home — if you suspect fleas or you're seeing skin irritation, it's worth a vet visit.