apparently, in Switzerland, it's illegal to own just one guinea pig without owning a second companion for it as they are very social creatures and will get lonely and depressed without company. http://www.spiegel.de/international...ervice-takes-off-in-switzerland-a-787336.html
I don't support it, but meh - that's a matter for the Swiss. Over here they're looking at significantly regulating home-breeding. We have our own problems to deal with.