A healthy dog will have clear skin and a healthy coat of fur. If your dog is experiencing dandruff that comes away in black flakes and has greasy skin, it could have a fungus skin infection.
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Fungus Skin Infection
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Canine skin infections caused by fungus are often triggered by a kind of yeast called malasezzia, according to "Skin Diseases of the Dog and Cat: Clinical and Histopathologic Diagnosis."
Significance
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Yeast skin infections are most common in basset hounds, bulldogs and dachshunds, although they can occur in any breed.
Symptoms
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Canine fungus skin infections often develop in a dog's ears or in folds of its skin. The skin will be greasy and smell musty. The dog will have dandruff and scabs that can be black in color.
Treatment
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Fungus skin infection can be treated with anti-fungal creams and shampoos, according to "The Complete Healthy Dog Handbook." Oral medications are available for severe or persistent fungus skin infections.
Considerations
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You can help prevent canine skin infections by bathing your dog with a mild shampoo. If your dog's greasy skin does not clear up after a bath, it is time to contact your veterinarian.
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