My beige rat Mitzey has had the sniffles lately. When she sleeps in her hammock, I can hear her make little sneezing sounds ("chew, chew, chew..") and her little body shakes each time. It sure seems like she's sneezing, and just a few minutes ago when I had her in my lap she tried to take a bite of me..

Something she has not done since I first got her months ago.
She and her cagemate Socks have had aspen shavings for bedding for awhile, then I noticed Mitzey's sneezing and thinking maybe the bedding was to blame, I went to Walmart and got some stuff called Critter Care. It is very similar, if not the same, as Carefresh (what I used a lonnng time ago).
Her sneezing and sniffles have not stopped though, not even with the bedding change. Their cage is also right next to a floor vent so I don't think it could be because they are too cold. Any ideas?