Thank you so much for responding. That's what has me puzzled, too - the lack of other symptoms. I mean, not even a HINT of other symptoms! I've had multiple cats for 25 years, and I've never had one present with a upper respiratory infection without some kind of gunk. I'm kind of wondering if...
I'm hoping someone can offer up some advice about a stray kitten that showed up last night. I'd say it's maybe a few months old. At first it appeared healthy - clear eyes, friendly (but ornery enough that I'm sure he's feral), energetic (follows us and our dog everywhere in the yard). We have...