I only bathe them once a year in summer but even then only if they are particularly smelly that even a clean out won't sort it. (I live in a open plan flat so if they are smelly you can't really ignore it). And even then, I'd only do this is summer or warm spring days. They hate baths so I don't like putting them through the stress.Anyone have advice on how often you should bathe a guinea pig and how it should be done? My piggies are pretty timid so I don’t want to terrify them.