Seborrhea in dogs looks like visible flaking, scaling, or greasy patches on the skin and coat. It often resembles severe dandruff, and you may notice white or grayish flakes on your dog’s bedding, furniture, or wherever they rest. Depending on the type, the skin may appear dry and flaky or oily and waxy, sometimes with redness and crusting in the affected areas.
Dry Seborrhea vs. Oily Seborrhea
Dogs develop one of two forms of seborrhea, and many dogs actually have a mix of both at the same time.
Dry seborrhea (seborrhea sicca) produces loose, white or light-colored flakes that fall off easily. It looks a lot like human dandruff. The skin underneath often feels rough and may appear slightly red. You’ll typically find flakes scattered through the coat and collecting on surfaces your dog lies on.
Oily seborrhea (seborrhea oleosa) looks quite different. The skin and hair feel greasy or waxy to the touch, and the scales tend to be yellowish or slate gray rather than white. Instead of falling off freely, these waxy flakes cling to the fur and skin. Dogs with oily seborrhea often have a strong, musty smell that doesn’t go away with regular bathing. In severe cases, the skin looks inflamed and red, and the coat has a matted, clumped quality from excess oil.
Where It Shows Up on the Body
Seborrhea tends to concentrate in areas with the most oil-producing glands. The skin along the back is one of the most commonly affected zones. You may also see it in skin folds, around the ears, on the belly, and along the neck. Some dogs develop crusty, flaky patches in just one or two spots, while others have widespread scaling across large portions of the body. The ears can be particularly affected, with waxy buildup inside the ear canal or flaking around the ear flaps.
The Smell
One of the most distinctive signs of seborrhea, especially the oily form, is a strong and persistent odor. This isn’t the normal “doggy smell” after a rainy walk. It’s a rancid, almost sour scent that lingers even after bathing. The smell comes from excess oil production combined with bacterial and yeast overgrowth on the skin surface. If your dog smells noticeably worse than usual and you’re also seeing flaking or greasiness, seborrhea is a likely explanation.
Secondary Infections Change the Picture
Seborrhea rarely stays a simple scaling problem. The abnormal oil production and disrupted skin barrier create ideal conditions for bacterial and yeast infections to take hold. These secondary infections can significantly change what the skin looks like.
A yeast infection (caused by a fungus called Malassezia) adds a waxy, yellowish or slate-gray quality to the scales. The skin may thicken over time and become darker, especially in areas of chronic irritation like the armpits and groin. Bacterial infections produce small raised bumps, pustules, or circular crusty lesions that can look similar to ringworm. Many dogs with seborrhea deal with both yeast and bacterial infections simultaneously, which makes the skin look more inflamed, red, and irritated than scaling alone would.
Conditions That Look Similar
Several other skin problems can mimic the appearance of seborrhea, so it helps to know the differences.
- Sarcoptic mange causes intense itching with papules, crusting, and scaling, but it starts in specific locations: the ear margins, elbows, and hocks. Dogs with mange scratch relentlessly, often more than dogs with seborrhea alone.
- Demodectic mange produces patchy hair loss with redness and scaling, but it typically starts as small, localized bald spots rather than widespread flaking.
- Cheyletiellosis (sometimes called “walking dandruff”) causes flaking along the back that looks very similar to dry seborrhea, but it’s caused by mites and is highly contagious.
Because these conditions overlap visually, a vet will often do skin scrapings or cytology to rule out parasites and identify any yeast or bacterial involvement before settling on a seborrhea diagnosis.
Primary vs. Secondary Seborrhea
Primary seborrhea is an inherited condition where the skin cells turn over too quickly, producing excess flakes and oil regardless of other health factors. It tends to appear in young dogs and is most common in American Cocker Spaniels, English Springer Spaniels, Basset Hounds, West Highland White Terriers, Dachshunds, Labrador Retrievers, Golden Retrievers, and German Shepherds. If your dog is one of these breeds and develops persistent flaking or oiliness, primary seborrhea is worth investigating.
Secondary seborrhea is far more common and is triggered by an underlying problem. Allergies (including environmental and flea allergies), hormonal disorders like hypothyroidism, and chronic skin infections all cause the skin to respond with abnormal scaling and oil production. In these cases, the seborrhea looks identical to the primary form, but it won’t fully resolve until the underlying trigger is treated.
How Seborrhea Is Managed
Medicated shampoos are the cornerstone of managing what you see and smell on your dog’s skin. The right shampoo depends on whether your dog has the dry or oily form. For dry seborrhea, shampoos containing moisturizing ingredients like lactic acid, essential fatty acids, or glycerin help hydrate the skin and reduce flaking. For oily seborrhea, ingredients that cut through grease and slow oil production (like benzoyl peroxide or selenium disulfide) work better. Shampoos with sulfur or salicylic acid address both scaling and excess oil and are common choices for dogs with a mix of symptoms.
Bathing frequency matters. Most dogs with active seborrhea need medicated baths more often than a typical pet, sometimes weekly or even twice weekly during flare-ups, then tapering to a maintenance schedule. If secondary yeast or bacterial infections are present, your vet will treat those as well, since the infections drive much of the redness, odor, and worsening appearance. For secondary seborrhea, identifying and addressing the root cause (whether it’s allergies, a thyroid issue, or something else) is the only way to get lasting improvement.