Etta has developed feline acne, gets quite sore, also sores in mouth. Does anyone know of a homiopathic approach for food. Does it work? Vet says she's having an allergy problem & something about the size of protiens in regular food. There was only one special food availabe from Science Diet & she wouldn't eat it. I don't want to keep giving her prednisone. Help! Etta's mom