Is Zeus getting a cold?

Zeus is an exotic shorthair and he sounds like he has a stuffy nose. It sounds kind of snotty and he keeps sneezing. I caught him coming out of the other cats litter box with scented litter because someone shut the door to his room where his "special" box is. He uses Yesterdays News. Could his nose just be irritated or is it time for a trip to the vet?

It could be from the litter.
If Coco uses a scented litter the same thing happens.
She also uses Yesterday's News.
I use it for all my cats because they use the same pans.

I am going to switch too but wanted to use up the last I had of the scented.