I too have a cat with Pseudomonas. I got her from a hoarder, which is how she aquired the disease. I am interested, did you do the iodnine therapy? Did it help? We have been to 6 vets, 5 of which have given up on me, but I ham determined not to give up. The one vet who has not given up studies Chinese herbs. Daisy is on an herb called "Nasal Damp Heat" and it has REALLY helped. She also gets nebulizer treatments daily with a human Antibiotic called Timentin put into the nebulizer for her to breathe. With these 2 things, she breathes clearly although it is not a cure. It just keeps us snot free and nasal passages open. It's the best we can figure out. I am going to ask her about the Iodine though.