Coat and skin
How often to bath a dog: three criteria, not a calendar
Coat type, lifestyle, state of the skin. The three criteria that set how often a dog is bathed, and the signs that tell you to wash him rather less often.
There is no right answer in weeks
The question always comes as "how often". The honest answer is that it depends on three things, and that a single figure would be true for nobody. Coat and skin type, lifestyle, and the state of the skin at the moment you ask.
A useful order of magnitude all the same: plenty of healthy dogs, with no particular exposure, get by on a few baths a year, topped up with regular brushing. Brushing does a large part of the job people expect from the bath. It takes out dead hair, dust and debris, spreads sebum along the shaft, and prevents mats. It damages nothing.
What the coat dictates
| Coat type | What it changes | Point to watch |
|---|---|---|
| Short, smooth coat | Baths well spaced out, quick drying | Brushing is often enough between two baths |
| Dense coat with an undercoat | Wetting and drying both take a long time | An undercoat left damp creates smell and soreness |
| Long, fine coat | Mats easily | De-mat before the bath, never after, water tightens knots |
| Curly, continuously growing coat | More regular upkeep, usually tied to grooming | De-matting counts for more than how often it is washed |
| Harsh coat | Frequent washing softens the texture | Specific products, baths well spaced out |
| Skin with folds | The folds hold damp and debris | They are looked after separately from the bath |
What lifestyle adds
A dog that runs through mud, rolls in cut grass or swims in a pond is not in the same situation as a town dog walking on tarmac. Two useful nuances.
A dirty dog does not always need shampoo. Rinsing with clean, warm water, or letting the mud dry and brushing it out, is enough in many cases and leaves the skin alone.
After a swim in the sea, a lake or a pool, a rinse with clean water is advisable: salt and the disinfectants in pools stay on the coat and dry the skin out. That rinse is not a bath, and it does not count towards the frequency.
Over-washing, what it actually does
Every wash removes part of the hydrolipidic film, the mix of water and fats that protects the skin's surface and holds moisture in. On healthy skin and with a suitable product, that film rebuilds itself. If washes follow one another faster than it rebuilds, the skin stays permanently in deficit.
The signs that should make you ease off: dandruff appearing in the days after a bath, skin turning red, a dog scratching or licking more after a bath than before, a coat that is dull, dry or brittle, a smell coming back sooner than it used to. That last point surprises people, but skin that has been stripped can see its surface flora go out of balance, and the smell returns sooner.
Under-washing exists too, but it is seen less often. It shows as a greasy, clumped coat, an established smell and debris building up at the base of the hair, mostly in dogs with greasy skin.
The special cases
If a vet has set a washing rhythm as part of a follow-up, that rhythm overrides everything written here, and it is not changed at your end. The same goes for the products they have specified.
In older dogs, a bath is more tiring: a non-slip floor, warm water, a short session, quick drying in a room with no draught.
Do not use essential oils in bath water or on the coat. They are dangerous for cats, including through contact with a dog carrying them and through being diffused in the room, and they bring nothing to the dog.
The real signal
The point to hold on to: when the question "should I wash him more often" comes up because the skin is itching, smelling or flaking, frequency is not the subject. Scratching lasting more than a few days, redness, crusting, bald areas or a new smell need a veterinary examination. An unidentified cause carries on working while the bath calendar is being adjusted, and damaged skin gets harder to put back in order as time passes.
Frequently asked questions
Can you bath a dog every week?
It is possible in some situations, with a mild product and careful rinsing, for instance in a dog heavily exposed to dirt or as part of veterinary follow-up. It is not a routine to adopt by default. On ordinary skin washed with a product that strips too much, a weekly rhythm usually ends up producing dryness and itching.
From what age can a puppy be bathed?
In a very young puppy, you generally limit yourself to cleaning a dirty area locally, with a damp cloth and warm water. A full bath waits until the puppy is sturdier and properly settled with you, and it is done with a specific product and quick drying. The vet looking after the puppy will tell you when it becomes reasonable.
My dog smells, should I wash him more often?
A smell that comes back a few days after a proper bath is not a frequency problem. The common causes are the ears, the skin folds, the anal glands, incomplete drying or an imbalance in the skin. Washing more often masks the smell for a few hours and weakens the skin, without settling anything.
This article explains and points the way. It is not a diagnosis and is not a substitute for a veterinary consultation. It is published as a preliminary version and will be signed once a veterinary surgeon has approved it.
Also worth reading
Brushing a long-haired cat: the areas everyone forgets
Where the mats actually form on a long-haired cat, why those are the spots nobody brushes, and the one bit of handling that changes the whole session.
Cat losing hair: the test to do before you start worrying
How to tell whether your cat's hair is falling out or whether the cat is breaking it off by licking, and what each of those two cases actually implies.
Dog shampoo pH: why a human product does not suit
A dog's skin sits close to neutral, human skin is acidic. What that one difference actually changes when you are choosing a shampoo bottle off the shelf.
Human shampoo on dogs: what the pH really changes
Why human shampoo damages a dog's skin, what happens if you have already done it once, and what is actually worth reading on a dog shampoo label instead.
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