Sneezing but no other symptoms?

[hot fox]

Oscar has been sneezing quite a lot over the last few days. He is absolutely fine in every other respect, he does not have a wet nose or eyes, no wheezing or clicking sounds in his lungs, he is eating fine and it very happy for a cuddle. And is bright and lively as ever.
We use dust extracted hay and there's been no other change I can think that may have caused this. They have fleece, with inco pads underneath, and hay in boxes or special hay cube rack things I found on ebay.
Should I be worried? :... All the others are fine by the way.
Advise gratefully received, as ever!

 

[jessica*rabbit]

mine sneeze constantly, i was really worried and took them to a vet, nothing was wrong. its been going on for ages now, i think its the hay, we're just trying out different types to see what works best!x x x

 

[daleksarah]

my piggie rodney sneezes quite a bit and i do think its down to the hay

 

[hot fox]

Yes, I was thinking it's proabably the hay, but I use dust extracted, and have been using the same bag for a while, as I also use the barn dried grass, so I don't get though a huge bag that quickly. I'm fairly sure I remember him sneezing repeatedly soon after we rescued him, so it's probably just an Oscacious phase that he goes though now and then! He's a special boy <3 X x