Jen, what you said about stress has certainly crossed my mind. She was sniffling when I brought her home from the shelter, and her sneezing and watery eyes continued for about a week, then all of it began to clear up, just as it is now. What I was curious about was if there is something in the vets' office and in the shelter that is infecting the cats? Although they keep the places heated, I'm sure that it is not an open flame heater such as I have, and I am reasonably sure that they do not run the inside air through it. Chris cat had the same URI-type ailment when I first brought him home also.