Lisa, I know all about the frustrations of coughing, wheezing, and sneezing kitties. As far as I can tell, mine are all just passing around the seasonal URI virus! I've been keeping my vet in business through my purchases of Clavamox! I think the vaporizer suggestion is a good one, and also the cool mist ...as I have heard that you can breed more germs into the air if you don't keep warm vaporizers really clean!!!