My cat Joey aged 9 months had fungal infection previously on a small area near his ear. He was treated by a doctor and the infection went away soon. Recently a week back I saw the same infection come back and also on both his ears. I went to a different doctor and he gave him injections and INTERBAN F cream. I applied the cream for two weeks but today I saw his infection has increased to another area and he is losing hair there. What do I do? The doctor says it's in the process of healing. Is the infection spreading normal ??