Why does my dog have dandruff?
Dandruff in dogs — flaky, dry-looking skin, often more visible on darker coats — usually comes from something manageable like dry air, over-bathing or a coat that needs more regular brushing. Sudden, severe, or itchy dandruff, or flakes that appear to move, is different and is worth a vet's opinion rather than home management alone.
Usually not urgent
This is common and often manageable at home — but see a vet if it persists, gets worse, or comes with other changes.
The everyday causes
Dry indoor heating in winter, bathing too often, or using a shampoo not designed for dogs can all leave a coat drier than it should be, which shows up as visible flaking. This kind of dandruff is usually mild and improves once the underlying habit changes.
A coat that is not brushed regularly can also develop a build-up of dead skin and loose fur that looks similar to dandruff, simply because natural oils are not being distributed through the coat the way regular brushing helps with. This is often more noticeable in dogs with denser or double coats.
When diet or an underlying condition is involved
A diet lacking sufficient essential fatty acids can contribute to a dry, flaky coat over time, which is one reason some dogs are given an omega supplement as part of ongoing skin and coat care. This is a gradual improvement rather than a quick fix, and worth discussing with your vet if you suspect diet is a factor.
Allergies, hormonal conditions and certain skin diseases can also cause dandruff, sometimes alongside itching, redness or hair loss. These causes need a vet's examination to identify properly, since home grooming changes alone will not resolve a dandruff that has a medical cause behind it.
The one to watch for: walking dandruff
A parasite sometimes called 'walking dandruff' causes flakes that appear to move slightly on close inspection, and is more contagious and more itchy than ordinary dry skin. If you notice this, or your dog is scratching a lot alongside the flaking, it needs a vet's assessment rather than a change of shampoo.
This condition is treatable once identified, and getting it diagnosed properly also matters because it can spread to other pets in the household and, in some cases, cause mild skin irritation in people too.
What actually helps
A gentle, dog-specific shampoo used no more often than needed, followed by regular brushing between baths, is the simplest way to manage mild, everyday dandruff and helps distribute natural oils through the coat rather than stripping them out. Human shampoo is worth avoiding altogether, since it is formulated for a different skin pH and can leave a dog's coat drier than before.
An omega-rich skin and coat supplement can support coat condition over several weeks of consistent use, though it works alongside good grooming rather than replacing it. If dandruff persists despite these changes, or comes with itching, redness or hair loss, see your vet rather than continuing to try different shampoos.
Choosing the right grooming tools
The right brush depends on your dog's coat type — a slicker brush works well for distributing oils through a longer or double coat, while a rubber grooming mitt suits a short-coated dog and can be gentler on sensitive skin. Brushing two or three times a week is usually enough to make a visible difference to mild dandruff.
Bathing too often strips the coat of the same natural oils that help keep skin healthy, so unless your vet has recommended a specific washing routine, once every four to six weeks is a reasonable starting point for most dogs, with brushing doing the day-to-day maintenance in between.
What can help
Things we stock that owners commonly use alongside a vet’s advice — not a substitute for it.
Wahl Competition Series Clipper Blades
High-precision, chrome-plated clipper blades with a rust-resistant finish, available in 17 sizes for every coat type and clipping style.
From£37.99
Wahl Pet Grooming Scissors with Finger Rest
Stainless steel finishing scissors with ergonomic offset handles — perfect for tidying around eyes, ears, mouth, and paws.
£5.49
Slicker Brush for Dogs — Detangling & De-shedding
An ergonomic slicker brush with anti-scratch pins that works through tangles and removes dead hair from top and undercoat.
From£9.99
Ancol Ergo Wooden Handle Slicker Brush
A stainless steel slicker brush on a wooden handle, for short, long, wiry and curly coats
From£6.99
Common questions
- Is dog dandruff caused by dry skin?
- It often is, especially from dry indoor heating, over-bathing, or a coat that isn't brushed regularly enough to distribute natural oils. This kind of dandruff is usually mild and improves with a gentler grooming routine, though persistent or severe flaking is worth a vet's opinion.
- What is walking dandruff in dogs?
- It is caused by a parasite that makes flakes appear to move slightly on close inspection, and is more itchy and contagious than ordinary dry skin. It needs a vet's assessment to diagnose and treat properly, rather than being managed with a change of shampoo at home.
- Can diet cause dandruff in dogs?
- Yes, a diet lacking sufficient essential fatty acids can contribute to a dry, flaky coat over time. An omega supplement is sometimes used to support skin and coat condition, though improvement is gradual and it is worth discussing with your vet if you think diet is a factor.
- When should I see a vet about my dog's dandruff?
- See your vet if the dandruff is sudden, severe, comes with itching, redness or hair loss, or if the flakes appear to move. Mild, everyday flaking that responds to gentler grooming and regular brushing is usually not a cause for concern.
- How often should I bathe a dog with dandruff?
- Unless your vet has recommended a specific routine, bathing too frequently tends to make dandruff worse rather than better, since it strips natural oils from the skin. Once every four to six weeks with a gentle, dog-specific shampoo, alongside regular brushing in between, suits most dogs with mild, everyday flaking.
- Can the weather make dog dandruff worse?
- Yes, dry winter air and central heating are common triggers for a temporary increase in flaking, in much the same way human skin can feel drier in winter. Regular brushing and not over-bathing during these months usually helps, and the flaking often settles again as the weather and humidity change.
Related
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Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.