Owners usually ask, why does my dog have dandruff, when the flakes appear suddenly or seem to “stick” no matter how much they brush. Common triggers include low humidity, frequent bathing, a new grooming product, or a coat that’s shedding heavily. Less commonly, parasites, allergies, endocrine issues, or infections can be involved.
A quick at-home check can clarify the urgency: part the coat in good light and look for redness, thick scale, or moving specks; notice whether your dog is itchy; and smell the coat near skin folds. If there’s odor plus itch, yeast is one possibility to discuss with your vet. If it’s simply dry flakes with normal behavior, start with routine upgrades.