I understand your concern for your rabbit’s sneezing. It’s not something pleasant to witness because you m keep they’re somewhat uncomfortable.
You can read my “Meet Wick!” post for more details, but short story is Wick has been on treatment for sneezing since the first week I’ve had him.
Aside from Wick’s actual bacterial root for his sneezing, dust aggravates him a lot. I switched from Kaytee to Oxbow hay and immediately his sneezing improved; I found shaking out dust didn’t really help too much. I also began to dust more often around his hutch.
My main indicator for the hay was he’d sneeze much more while eating, especially the small bottom bag hay. Keep in mind that it may not actually be hay dust, but potentially whatever pollen and particles are on the hay from where it’s grown.
I’m not a vet, but two sneezes, I’d think is negligible. Even more so if it’s only happened once. If you start seeing nasal discharge (rabbit can’t wipe away all of it if it’s bad), then speak with your vet. Wick sneezed literally each minute and would have sneeze attacks of 10+sneezes in a row.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.