We just started using a great new shampoo for itchy, "allergic" skin types with oatmeal and tea tree oil. Have to go grab the bottle for the name. But, be careful using tea tree oil around kitties. I read recently that it is highly toxic to cats. Sorry about Jasper's setback Hopefully the increased dosage and a good shampoo will help. Perhaps your vet can suggest a prescription shampoo? Feel better Jasper (Back with the shampoo name)