I am housesitting a Siamese cat which appears to have a bit of congestion - sniffles and snotty nose when they breath. But otherwise the cat is in perfect health (still eating well and very playful and friendly) and I know has all it's vaccinations up to date. So I am pretty sure it is not cat flu. But am wondering if it could be hayfever (it is hayfever season here and I have been suffering it myself). And if that is the case is there anything you can do for it. Years ago I did have a cat that seemed to get more sneezy during hayfever season but didn't have a snotty nose. But otherwise my cats have never had this problem so I am unfamilar with it. I will give the vet a call later on today as well as the person whose house it is has given me their phone number and address.