On Sahara's first day here, I treated her for ear mites and all the rest of the cats. They seemed to be clean of ear mites at that time. Yesterday, I noticed Sahara scratching at one of her ears and when I checked, it had a dark crusty crust inside. The other one is just fine. I took her to the vet and he said it was ear mites and gave me medicine to put in her ears. I cleaned them out with a saline solution first, because she has an open sore in there. I'm afraid to put the ear mite medicine when this sore is still open because I'm afraid it will hurt her even more. The vert said it will be fine, but I wanted your advice first.