Today I noticed a weird smell coming from Buster's cage... It smelt somewhat fishy, but more what people describe as just a "rabbit" smell. (Before I got Buster I was told not to get a rabbit because they "SMELL SOOOO BAD"... despite me never smelling anything from him.)
Just this one time though, he must have had a stinky cecal or something. I turned on my ceiling fan and it was gone
I'd say though if it's a constant thing to get him checked out.