My male cat has recently started having these sneezing fits, but there is no discharge from his eyes or nose, and he's eating and acting normally. After a sneeze attack, he'll rub his nose with his paw like a person suffering from allergies might do. Should I be concerned about this? Could he just be having allergies? As I said, he's eating and drinking normally and still is interested in his normal routine. No lethargy or hiding or any other outward symptoms except for the sneezing. Is there any supplement I can give him to help him out? I was thinking maybe some lysene in case it's the beginning of a uri, but opinions are appreciated. Has anyone else experienced this?