what does the inside of her ear look like?

from vetinfo.com about ear mites: "Dark brown to black debris accumulates in the ears of infected pets and the mites may be visible as small moving white specks on the debris. Secondary infection with bacteria or yeast is common in ear mite infections and may complicate the diagnosis. The mites can live on the skin and some dogs and cats appear to have infections that affect only the skin, causing small sores to develop in affected areas. It is important to treat the ears for mites and the whole pet with a product that is capable of killing the mites. Most flea and tick products will kill ear mites on the skin."

Take Snow to the veterinarian.