Hopefully you'll get to the bottom of it by day's end. It's just curious that they are ALL sneezing. The environment does not sound healthy, whatever it is that may be blowing in. Glad your vet is willing to work with you. If she has cat/kitten experience that's great.
Did you mention herpes to the vet?
Keep us posted as to what happens!
Did you mention herpes to the vet?
Keep us posted as to what happens!