My friend's cat is a neutered male, about 3 years old. Recently he has developed some sort of infection in his jaw that responds to antibiotics, only to return when the antibiotic is finished. He is now half way thru a month-long dosage of "zenical" or "zenicare" (I'm not sure the name of the med). His jaw is not getting better, it appears bloody and the poor cat's eye is swollen halfway shut. He is under constant vet care, blood work, allergy testing, everything, but still cannot be diagnosed and cured. Has anyone out there heard of this? What can this be? He eats and uses his litter box okay, but his jaw/cheek looks horrible. Help!!