Does anyone have suggestions for products to relieve itchiness? Miss Arizona has been overgrooming for a couple of years now, and the vets have no idea what her problem is. We've ruled out food allergies and she's never had fleas. She seems to be itchy--she rubs her chin on things a lot and attacks herself in sudden violent spurts of determined licking and biting. I'd like to see if I can try something topical to help her out.