Flea and tick season in Brooklyn: what to use, and when

People assume a city dog is a low-risk dog. Bay Ridge has Shore Road, Owl’s Head, Dyker Beach and a great deal of long grass between here and the water, and the raccoons and opossums that move through the yards at night carry the same passengers as anything in the woods.

The season, locally

Fleas are active whenever it is above roughly 50°F, which in New York means roughly March through November outdoors and all year in a heated apartment. That last point is the one people miss: a flea population that gets into a building does not have a winter.

Ticks have two peaks. Nymphal deer ticks are most active from May through July, and they are the ones that transmit disease most often because they are the size of a poppy seed and easily missed. Adults peak again in October and November and stay active on any day above freezing.

Prevention is a vet product, not a shampoo

This is the important part and we would rather say it plainly than sell you the wrong thing. Monthly preventatives — the topical and oral products your vet prescribes — are what stop an infestation. They work systemically or across the skin surface for weeks.

A flea and tick shampoo does something different and narrower: it kills what is on the animal at the moment of the bath. It has effectively no residual action. It is a treatment for a dog that has come home with passengers, not a defence against picking up more tomorrow.

Both have a place. Buying the shampoo instead of the preventative is the mistake.

Where a shampoo genuinely helps

• An animal that has arrived with a visible infestation and needs the load knocked down today
• A rescue or foster coming in from an unknown situation
• A dog too young or too small for a particular preventative, on vet advice
• Households wanting a plant-based option between prescribed doses

Read the label for the species and the minimum age. Several plant-derived actives that are fine on dogs — particularly essential-oil formulations — are not safe on cats, whose livers process them differently. If you have both animals in the flat, keep the products separate and do not let a treated dog sleep against a cat until it is dry.

Bathing correctly

1. Wet the coat thoroughly with warm water.
2. Lather a collar of shampoo around the neck first. Fleas run for the head when the body gets wet, and that band stops them.
3. Work backwards to the tail, then the legs and belly.
4. Leave it on for the full contact time on the label — usually five to ten minutes. This is the step people skip, and it is the step that does the killing.
5. Rinse completely, then comb through with a flea comb while damp, dipping the comb in soapy water between passes.

The apartment matters more than the dog

Most of a flea population is not on the animal. Eggs, larvae and pupae live in carpet, bedding and the cracks in floorboards, and they are what re-infests a treated dog within days.

• Wash all bedding at 60°C, the animal’s and yours.
• Vacuum daily for two weeks, including under furniture and along skirting boards, and empty the canister outside every time.
• Expect it to take three to four weeks to break the cycle. Pupae are resistant to almost everything and hatch on their own schedule.

Removing a tick

Fine-tipped tweezers or a tick hook. Grip as close to the skin as you can, pull straight out with steady pressure, and do not twist. No petroleum jelly, no matches, no alcohol first — anything that stresses the tick makes it more likely to regurgitate into the bite.

Clean the site afterwards and note the date. If a rash spreads out from the bite, or the dog becomes lethargic, off its food or lame in a shifting way over the following weeks, that is a vet visit and the date matters.

Daily checks beat everything

After a walk in long grass, run your hands over the dog with your fingertips rather than your eyes — ears, neck, armpits, groin, between the toes and under the tail. A tick found before it attaches is not a problem at all. Sixty seconds, every time, is the cheapest prevention there is.

Come and ask

If you are not sure whether what you are seeing is flea dirt or ordinary grime, the test is easy: comb some onto a damp white paper towel. Flea dirt is digested blood and leaves a rust-red halo. Ordinary dirt does not. Bring it past the counter if you would rather have someone else look.

Cats, indoor and otherwise

An indoor-only cat is not immune. Fleas arrive on a dog, on a visitor’s trousers, on a second-hand chair, or through a window on a warm night. Cats are also more prone to flea allergy dermatitis than dogs — a single bite can set off weeks of over-grooming, and the bald patch on the belly that follows is often the first thing an owner notices, long after the fleas themselves have been and gone.

Two rules for cats specifically. Never apply a dog product to a cat, whatever the active ingredient; permethrin in particular is highly toxic to them and the concentration in some dog spot-ons is enough to kill. And check the label of any plant-based shampoo for species, because several essential oils that are perfectly safe on a dog are not safe on a cat.

A realistic yearly rhythm for this neighbourhood

• March — preventative back on if you paused it over winter; wash all bedding.
• May to July — the nymph tick peak. Daily hand-checks after any walk near long grass; keep a tick hook where you actually take the leash off.
• August — the flat matters more than the dog. Vacuum weekly and empty outside.
• October to November — adult ticks are active again. People stop checking exactly when they should not.
• Winter — outdoor risk drops, indoor risk does not. A heated building keeps a flea population going all year.

Ask your vet whether year-round cover makes sense for your animal. In an apartment building in this part of Brooklyn, the honest answer is usually yes.