small bald patch...
Hi! Is this the same Luxy that's getting a Boston Terrier puppy? (There can't be too many by that name!)
It's possible that this is just dry skin, especially at this time of year, but the location of the patches also reminds me of an autoimmune disease called "Eosinophilic Placque" (a fancy name for rodent ulcers, which aren't always on the lips). You might want to have your vet take a skin scraping and check for the characteristic cells, as well as ruling out other nasties like mites and ringworm.
I've had pretty good luck solving both dry skin and rodent ulcers with a good diet, Omega-3 fatty acids and Vitamin E. Get Vit E capsules, 100-400 IU per day (just the regular human kind from the health food store is fine). Most cats will lick it off your finger if you poke the capsule with a pin and squirt it out; or in the food. You can also apply it directly to the patches, but watch to make sure she doesn't get carried away with licking it off and create a worse problem. Both Vitamin E and Omega-3 supplements will help support her immune system, too--important for an FELV kitty. For a free, detailed list of supplements and dosages: http://www.littlebigcat.com/index.php?a ... atsanddogs
I know I'll open up a can of worms here, but I have to tell you, my definition of "good diet" does not include dry food. Why not? See http://www.littlebigcat.com/index.php?a ... cannedfood