Recently, I'd noticed Meep (an 8 year old DSH) licking her lips a lot,
which prompted a vet visit.  Vet mentioned there's a tooth with a red
line which might need to be extracted eventually, but nothing to worry
about yet.  She chews on that side of her mouth, and hasn't shown any
sign of sore teeth (she gets free-choice dry, plus canned at night)

However, after playing with a cat toy that has very tiny, fine feathers,
she had a sneezing attack - easy to diagnose, but even afterwords she
had that kind of cross-eyed look I recognize in myself if my nose
tickles.  I checked her nose, but nothing obviously wrong.  This was a
few days ago.

In the meantime, she's still licking her lips - or nose? - more than
normal, and once or twice I've noted a perfectly clear drop of liquid
sitting between her nostrils.  Eventually she licks it off.  Makes me
wonder if the licking is because of an itchy nose, rather than teeth.

She also still gets that cross-eyed, internal look, and shakes her head
occassionally.

Other than this, she's perfectly normal.  Gets the rips on a schedule
you could set your clock by, goes to bed at promptly 10pm, even if we
don't, eats and uses the litterbox normally.  There's absolutely nothing
 out of the ordinary in her day-to-day behavior.

I tend to be a worry-wart, so I could be overemphasizing perfectly
normal behavior, that I'm just noticing more.  Like most cats Meep
doesn't enjoy vet visits, so I don't want to take her in again if this
is nothing.

Could she have inhaled a feather?  If she did, is there anything that
can be done, or will it have to resolve on its own?  Is it a problem?

jmc