Update: I don't think it's ringworm. She hasn't been exposed to other cats or anyone with ringworm. She's an indoor cat and has been in this apartment non-stop since I lived here. Her sister was only to the vet last summer and is fine. I found an article that said if it looks like ringworm...
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I just signed up and I'm looking for some help with my 12-year-old cat Pita. She has always been a very durable and healthy cat. About a week ago I noticed a white spot a bit smaller than a dime on the back of her ear. There was some hair loss, too. Whenever she or her sister, Savvy...