Hi Jenn and welcome!
I have heard our Bindy sneeze a couple of times lately, no runny noseor eyes either , however when she does sneeze I take note and when Ihave looked in her hutch there has been the left over dust from herpellets in her bowl.
Maybe check your bowl for dust from the pellets.
From now on I am going to put Bindys pellets in a sieve to get the dust out before giving them to her.
Just a thought.