What might be causing our 7 yr old male cat to constantly be sneezing, now having mucus come out his nose? The sneezing has been going on for a couple months, the mucus noticed today. Nothing in environment has changed, same food, same cat litter

I read in an article something similar to what you are asking. Only it was a dogs nose, and it turned out to be a porcupine quill went up his nose and into his sinus. I'm not saying that's what it is. But it could be something up there that is causing it. Your vet will be the best bet.

I had a cat that had allergies but it could be a virus. I would have him checked