Last year we heard some sneezing in our grow-out cages. We had put them in a small room adjacent to the goat stall because we had too many for our original rabbit shed and the new barn was under construction. Never saw any snot. No deaths. Just occasional sneezing. We worried at first but just kept observing. This year with all the rabbits in one room of the new barn I haven't heard any sneezing. I think perhaps experienced rabbit raisers emphasize sneezing as an emergency because some of us when newbies are very laid back and don't pay enough attention to something that seems so minor. Then others of us worry about everything and over react to the warnings. I'm just trying to say that a few sneezes aren't necessarily alarming, but you should keep a close eye on the situation.