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Fleas 101: Spotting Them, Understanding Them, and Clearing the Home

Fleas are easier to beat when you understand where most of them actually live, and it is usually not on your dog.

October 20, 2026 · 4 min read

Fleas 101: Spotting Them, Understanding Them, and Clearing the Home

Nobody likes finding out their dog has fleas. The itching, the scratching and the tiny dark specks in the coat make it feel urgent, and it often is. The good news is that fleas follow a predictable pattern. Once you understand it, you can stop guessing and deal with the whole problem instead of just the part you can see.

The life cycle in plain terms

An adult flea lives on your dog and feeds on blood. Females lay eggs, and the eggs do not stay on your dog. They fall off into bedding, carpets, couches, floor cracks and anywhere your dog rests. The eggs hatch into larvae, which are tiny worm-like creatures that hide in dark, protected spots and feed on debris. The larvae spin cocoons and become pupae. Inside the cocoon, a new adult waits until it senses warmth, movement or vibration, then emerges ready to jump on a host.

This is why fleas feel endless. The adults you can see on your dog are only one stage. Eggs, larvae and pupae are in the house, the hallway, the car and the yard. The cocoon stage can be especially stubborn, and can hold on for a surprisingly long time before it hatches. Treat only the adults and the next wave arrives on schedule.

How to check your dog

Do not rely on spotting a flea jump. Look for the evidence.

  • Use a fine-toothed flea comb. Run it through the coat slowly, especially around the neck, the base of the tail, the belly and the inner thighs. Wipe the comb on a damp white paper towel after each pass.
  • Look for flea dirt. These are small dark specks that can be flea droppings. If you press the specks on a damp paper towel and they smear reddish-brown, that is a sign of digested blood and a good reason to call your vet.
  • Watch for behavior. Heavy scratching, chewing at the base of the tail, nibbling the legs or restlessness at night can all point to fleas, although other skin problems can look similar.
  • Check the skin. Red patches, scabs or hair loss, especially near the tail and hind end, deserve a vet visit.

If you see any of these signs, dropping a flea comb into a cup of soapy water after each pass kills what you catch. A single comb session will not solve the problem, but it tells you how serious it is.

Treating the home and the yard

Because most of the flea population is not on the dog, the home needs attention too.

  • Wash your dog's bedding, blankets and any removable couch covers in hot water, and dry them on a warm setting.
  • Vacuum often and thoroughly. Cover carpets, rugs, baseboards, under furniture and the spots where your dog sleeps. Empty the vacuum bag or canister into a sealed bag and take it outside right away.
  • Do not forget the car, carriers and anywhere your dog rides or naps.
  • In the yard or on the terrace, flea larvae prefer shade and moisture. Keep grass trimmed, clear leaf litter and focus on shaded spots where animals rest.

Expect this to take more than one round. Because new fleas keep hatching from cocoons, cleaning has to continue for several weeks, not just one afternoon. If you live in an apartment building in Queens and your neighbors have pets, mention it to your landlord or building manager too, since fleas can travel between units.

Talk to your vet about prevention

This is the part we leave to the professionals. Your veterinarian can tell you what flea prevention fits your dog's age, weight, health and lifestyle, and can rule out other causes of itching. We do not give dosing advice or recommend specific products. A dog with an active infestation, skin damage or any other health concern should see the vet before anything else.

A good prevention plan is part of your dog's regular care, not an emergency reaction. Ask your vet at your next visit, especially if your dog spends time in parks, boarding, dog runs or around other dogs.

What happens at the salon

If your dog arrives with fleas or ticks, tell us ahead of time. Flea and tick treatments are an additional fee service at Marie's Pet Grooming, and they can add time to an appointment. Letting us know before the visit helps us plan, and it helps us protect the other dogs in the shop.

A bath is not a substitute for a vet-approved prevention plan, and it will not clear a home infestation. What a groom can do is give you a clean, well-brushed coat that is easier to check and a clear look at your dog's skin, which often shows problems you cannot see under the hair.

A simple next step

If your dog is itchy and you are not sure why, start with your vet. Once things are under control, we are glad to help get the coat clean and comfortable. New clients can email mariespetgrooming@gmail.com or text (718) 380-7387, and current clients can book through /appointment-booking. Please book about two weeks ahead and mention fleas or ticks when you reach out.

Marie's Pet Grooming, (718) 380-7387

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