I am a new bunny owner and recently I have noticed my bunny sneezing on occasion and he sometimes has a very small amount of white discharge coming from his nose; most of the time is clear. I read up on Sniffles and realize he has some symptons however he doesn't seem to be sick at all. He's been running around, doing binkies all over the living room. I do sometimes forget to clean his literbox as frequently as I should and I read that sometimes the build up of ammonia can cause a similar reaction. As soon as I clean it and put down a brand new bit of litter/bedding his sympton regress almost entirely. What are your thought?