Cats sneeze, and often it is hard to know whether sneezing warrants medical attention. Almost every day I see patients who sneeze and are congested. Most sneezing is due to mild upper-respiratory infections, but sometimes it is due to something more serious. Two weeks ago I met Kasey, an 11-year-old domestic shorthair cat. He had been having sneezing and nasal congestion for a few weeks, and he had a red [...]