Pool Chlorine and Your Dog's Coat: The After-Swim Rinse

If your dog swims in a backyard pool, the single most useful thing you can do for their coat takes about four minutes and costs nothing: rinse them with plain water before they dry off. Everything below is detail stacked on top of that one habit.

It is worth knowing where dogs can legally get in the water around here, because it narrows things. Town of Huntington code keeps dogs off all town beaches except paved areas and boardwalks. Sunken Meadow State Park allows leashed dogs only in its undeveloped eastern portion, not on the beach, and Caleb Smith State Park Preserve in Smithtown bans pets entirely. So for plenty of local dogs, swimming means a backyard pool — and treated pool water does something different to a coat than salt water does. That is what the rest of this is about.

What pool water leaves behind in fur

Two separate things happen when a dog swims in a treated pool, and they need different fixes.

The first is stripping. Chlorinated water is an oxidizer, and it lifts the natural oil off the hair shaft the same way it does on human hair. A coat that has lost that oil feels rougher, tangles more readily, and looks flat rather than glossy. On a curly or wavy coat, the loss of slip is what turns a normal week's worth of tangles into felted matting.

The second is deposit. Pool water is not just chlorine — it carries dissolved minerals, stabilizer, and often copper from algaecides or copper plumbing. When the dog dries off in the sun, the water evaporates and everything that was dissolved in it stays behind on the hair. That is the fine grit you feel when you run a hand backwards through a pool dog's coat in August.

The green tint people notice on white and cream dogs gets blamed on chlorine, but the usual culprit is copper. Oxidized copper binds to the hair shaft and shows as a green or brassy cast. It shows up on light coats first for the simple reason that there is no pigment to hide it.

A pool dog does not need more shampoo. It needs more water.

The plain-water rinse, done properly

This is a hose or a shower head and nothing else. No shampoo, no conditioner, no wipes.

Rinse the collar and harness too, or at least take the collar off while the dog dries. Wet webbing sits flat against the neck, holds pool water against the skin for hours, and is a common reason a dog is scratching at one spot on an otherwise clean coat.

Resist the urge to shampoo daily. Shampoo also removes coat oil, so a dog that gets bathed after every pool session ends up drier than one that gets rinsed after every session and properly bathed occasionally.

Drying a thick coat so damp fur is not sitting on skin

This is the part that causes real trouble, and it is invisible. On a double-coated or dense curly dog, the outer layer dries in the sun within the hour while the undercoat stays wet against the skin — sometimes for most of a day. Warm, dark, damp, and airless is the exact condition skin does not like.

Two things to avoid. Do not rub a thick or curly coat dry with a towel — the motion knots it. Press and squeeze instead. And do not put a wet dog in a crate to "dry off"; a crate has no airflow, and that is precisely the environment you are trying to avoid.

Household hair dryers are a poor substitute for the dryers groomers use. A grooming dryer moves unheated, high-velocity air that pushes water out of the undercoat mechanically. A hair dryer works by heat, which dries the coat surface, irritates skin, and can burn if held still.

Ears, folds, and the signs that mean a vet, not a groomer

Ears are the part most people forget. A drop ear — spaniels, retrievers, hounds, most doodles — folds a flap of skin over the canal and holds moisture against it after a swim. Upright ears drain and air out far more readily, which is why the same pool affects two dogs differently.

After a swim, lift the ear, wipe the visible part of the flap with a dry cloth, and let it air. Do not push cotton or liquid into the canal. If your dog is a heavy swimmer, ask your vet whether an ear-drying solution is appropriate for them — that is a veterinary call, and it varies by dog.

Wrinkled faces and tail pockets need the same treatment: dry the fold, gently, every time.

We are groomers, not vets. What we can do is notice — a bath and a full brush-out puts hands on every inch of a dog, so we often spot an ear or a patch of skin before an owner does, and we will tell you to get it looked at. We will not diagnose it.

Fitting a Bath & Brush into a summer of swimming

Here is the honest version. A short-coated dog who swims in a well-maintained pool and gets rinsed properly may not need a single extra salon visit all summer. If that is your dog, keep rinsing and save the money.

The dogs that do benefit are the ones where the home rinse has stopped being enough:

• The coat still feels gritty or squeaky after a thorough rinse
• A light coat has taken on a brassy or green cast
• The comb catches at the skin rather than gliding — early matting
• The undercoat is not drying out fully between swims

Our Bath & Brush is priced by weight, running from $35 for the smallest dogs up to $120 for the largest. It is a proper wash, a full brush-out and, importantly, a high-velocity dry that gets the undercoat genuinely dry rather than surface-dry. A full groom with a haircut runs $70 to $155, also by weight. If your dog is heading into a swimming summer, a shorter, tidier summer trim is easier to rinse and much faster to dry.

One practical note for pool households: our East Northport salon is closed Sunday and Monday. If the pool gets used hardest on the weekend, a Tuesday appointment is the natural reset, and a Saturday one is the tidy-up before it. You can see the full price list and book online at lillianruffpetspa.com/grooming — no phone tag, and you pick the slot yourself.

Questions people actually ask