Is a cat sneezing kindly of approaching our starting a cold?

Where it just needs to be watched a time or two or does it immediately need to be checked out? This started last darkness. She is an indoor cat, UTD on all shots and it's not a lot of sneezing, only once within awhile but she's never done this before. The vet's office is not open on the other hand so I'll most likely call them when they do... just considered necessary to get some ideas before they did since I'm gentle of overprotective. Thanks!
for my cats, when they start sneezing, it means they're coming down with a cold. but, a better clue is when they have a runny antenna.
I have indoor cats and when the weather changes two of them will start a sneezing. The vet told me that its the tweaking of weather and they might have alergies and it would just go absent. Since fall is here now they were sneezing but very soon around November they don't do it as much
Answers:    As long as she's only sneezing once in awhile, say, a couple times a sunshine, I wouldn't worry too much at all. If there is any mucous coming out of the eyes or muzzle, then it's more of a concern, although if the mucous is clear, it's not as much of a concern.

Interestingly, my vet told me that when they sneeze a lot (w/no yellow/green or other colore'd mucous) that they enjoy a cold that just needs to run its course like a human. If it last more than a week, then to bring your cat into the vet.
Cat "colds" (URI) can become deadly if left untreated. If you mind your cat loses her appetite, is congested, or is lethargic, she'll need to see a vet.
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