A Young Great Dane With a New Patch on Her Muzzle
by A reader
In a young dog, a single spreading patch on the muzzle is most often caused by demodex mites, ringworm (a fungal infection), a local bacterial infection, or contact irritation from a plastic bowl or toy. Young dogs that have been unwell or stressed are more likely to get a demodex flare, and repeated antibiotics can also allow yeast to overgrow.
Your vet can tell these apart quickly with a skin scraping, a hair sample under the microscope and sometimes a fungal culture. Getting the cause right matters, because ringworm and mites need completely different treatment than a bacterial infection, and ringworm can spread to people.
Until then, keep the area clean and dry, use stainless steel or ceramic bowls, wash your hands after touching it, and stop her rubbing or scratching it. If it keeps growing or new patches appear, have it checked soon rather than waiting.
See dog skin lesions, scabs and sores.
This is general information, not a diagnosis. Please follow your own vet's advice.
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