I notice my hay sometimes has a bit of a “dust” to it sometimes from the smaller pieces and one time when my bunny shoved his nose right into it trying to get “just the right piece” of hay to eat he ended up shaking his head and sneezing lol.
I have also noticed that sometimes with the pellets there can be a bit of a fine powder too that comes up from the bottom of the bag… which if any of that / or from the hay, gets in their nose it can make them sneeze.
And I have also heard that being said, bunny’s can have allergies too and she may be allergic to the current hay. What kind of hay is it? Timothy? I know I even get sneezy around timothy hay.
I would suggest two things;
1. get a water spray bottle and put it on the mist setting (you can get them from the dollar store) and just light spray her hay before you put it in the hayrack – Don’t spray the hay in the bag, just lightly spray what you take out to put in the rack. This will help keep the powdery stuff down.
You can even try that on her actual food as well. But maybe try one first to help figure out which one it is.
2. Yes, she could be allergic to the type of hay and you could try switching to a different kind.
If non of that makes any difference than yes, I would advise at least calling your vet to see about maybe getting her in earlier. A rabbit being sick isn’t too be taken lightly. But if its any of the above you may see a difference really quickly if its one of those.
Sending good vibes your bunnies way!