Thank all of you for your kind words.
Just knowing that one can puff a few breaths of air into our little guys to resolve that is of great comfort, BUT...
I'm still on pins and needles realizing that given where my guys take naps at, and how silently this occurs, that I might miss the event and not be able to react quickly enough, so...
My Vet said she would forward Fluoroscopy image to a Respiratory Specialist here, which will occur today. I'm considering further action to correct this problem, and am anxious to have the consult from the new Physician.
Though Becca is/seemingly back to her normal bossy self, I have not let her out of my sight for a moment. Thankfully I'm retired, and can ease my mind about her condition, but, I gotta get this fixed !!!
One more thing I'll add...
When the "event" occurred, both my Males and Navi (Female/Chi) were going totally nuts. Barking, running back and forth, just terribly upset in reaction to what was going on with their mate. One of those special events, which proves how connected the Pack is.