Our 4yr old cat has started sneezing three days ago. He is a indoor,up to date on shots,not exposed to other animals guy who has always sort of 'snorted' thru his nose. Now it is a wet type of sneeze, he is not his-self. Appetite down, sleeping more than normal and is quiet. He is usually very vocal.We adopted him 2 yrs ago and aside from being somewhat over weight has been healthy. No new products being used.