I'm glad that Butter is now home and that his vet visit went well too. When I first adopted Storm, I was feeding him a fish flavored cat food. He began to lose the fur on his ears and was also scratching a lot. I found out that he's allergic to fish. When I stopped feeding him fish, his fur grew back and he stopped scratching too. Hopefully Butter's problem is as simple as my Storm's was. Take care and please keep us updated.