About month ago, we noticed our outside cat was losing fur. Background: She is a cat that showed up at our house several years ago nearly dead. It was so sad. We brought her to the vet and nourished her back to health. Her legs had atrophied and she can not climb the fence to leave the yard. We think this is sad, but actually more a good thing, since she can't get hit by a car this way. We bring her in now and then...if it is very hot, very cold or for bad rain storms. She seems happy outside though. We feed her daily on the patio. She comes for dinner at night and a snack in the morning. A month ago, she was losing fur around her tail. We brought her to the vet, which we do infrequently. And I only gave her flea medication May-August, so I had not started it yet. They gave her a cortisone injection, and antibiotic injection and flea medication and told me I needed to give her the flea stuff year round and I agreed. They didn't send me home with any medications. At first she seemed to be doing a little better, but a week ago I realized it wasn't better and this morning II noticed a little loss of fur on her side. I gave her the flea medication today. Can cats get any topical tx? Is there anything I can get at the pet store for this? What types of things cause this? Thank you.