My vet said my 14 year old cat, Rusty, probably has a nasal tumor and that there is nothing that can be done. I really don't know what to do. I do have 99% DMSO (Dr. Jacobs) and have been giving him about 0.5 ml orally (mixed with fish juice for taste) a couple times a day. Flying blind here. Vet just gave me Prednisone. Any suggestions? Different dosage - more frequent? Should I add hydrogen peroxide? If I mix the two together and apply it to the side of his face? They saw a darkness in a sinus cavity on the right side. Lungs clear. left side OK. At first they thought it was URI as he was sneezing. They put him on clindamycin for two weeks. Blood came out of his nose and eyes. That isn't happening much now. He is off the clin. Can anyone suggest what might be helpful for Rusty.