It seems every year I get a strain of someting that goes through my house and gets some of my cats sneezing. They never get really sick, just sneezing. Of course I put them on a round of antibiotics and that's the end of it.
Well, this year is no different. I have something going through the house and 3 cats are sneezing. Bear was the first to come down with it and 10 days of amoxi didn't make any difference. My vet had just recently seen some other clients whose cats were deathly ill with the upper respiratory stuff so much the owner was asking about euthanasia. My vet being a fighter, said wait, let me get in touch with some specialists. The specialists recommended a cortizone shot to help soothe the nasal irratation and Doxycycline once a day. The client whose cats were very ill was pleased to see her cats make a full recovery.
I brought Bear in for the shot and he stopped sneezing almost immediately. He didn't even need the antibiiotic.
You must remember, which I have learned, cats get the herpes virus which is very contagious, but not deadly. We suspect Bear and another one of my cats has the virus and that's why they keep getting recurring bouts of sneezing without any other illness. No fever or anything.
Another one of my cats, Bubba, starting with the bad sneezing so I brought him in for the shot and he's 100% better. He did't need the antibiotic.
I have one outside cat who has episodes of sneezing every once in a while and she never takes any medication. She has no other symptoms, just sneezing, which goes away in a few days.
Good luck with yours.