Has anyone ever heard of fungus causing sneezing & runny nose in cats? What is the treatment? I've been trying for at least 2 years to find out what is wrong with my cat. Vets have tested for everything & can't find a problem. After numerous amounts of antibiotics & steroids the cat is no better. Someone told me they had a dog once that had this problem & it turned out to be fungus. I've researched fungus in cats but don't find much info. Any help appreciated.