And yes, it's actually true.

Weird
WTF?!
Weird Fact #114

In Switzerland, you can't keep just one guinea pig, so one woman rented them out

Swiss animal welfare rules forbid keeping a guinea pig on its own, so a woman near Zurich started renting out guinea pigs as companions.

October 9, 2026 · 2 min read · 4 sources

Your verdict

What do you think of this fact?

Imagine your guinea pig dies, and suddenly the survivor is a problem. Not an emotional one. A legal one. In Switzerland, that’s exactly what can happen.

The rule against lonely rodents

Switzerland’s animal welfare rules treat guinea pigs as social animals. The Swiss Federal Food Safety and Veterinary Office puts it bluntly: guinea pigs need others of their kind, they only feel good in groups of at least two, and they may not be kept alone. According to Mental Floss, the rule goes back to an animal rights law introduced in 2008 that gave pets which tend to get lonely a kind of “social right”.

The catch is obvious once you think about it. Two guinea pigs are unlikely to die on the same day. So when one of them goes, the owner is left with a single animal and, technically, a rule they’re now breaking.

Rent-a-guinea-pig

This is where it gets properly absurd. Priska Küng from Hinwil, a village near Zurich, came up with a fix: a “rent a guinea pig” service. As The World from PRX reported, it let people with only one guinea pig rent another one to keep the survivor company.

According to the trivia newsletter Now I Know, the deal reportedly worked like this: for about 50 or 60 dollars, Küng lent out a guinea pig for as long as the renter wanted. If the animal came back, the renter got half the fee back. Some rented guinea pigs reportedly returned after a few weeks. Others never made the trip home.

So, in short, Swiss rules created demand for rental companions. For rodents.

Bonus fact: Don’t think a rabbit can step in as a roommate. The Swiss authority writes that no human, and no rabbit either, replaces another guinea pig.

Why the fuss?

Guinea pigs aren’t cuddly loners. The Swiss authority calls them social rodents that need others of their kind, and it recommends a group of several females with one neutered male as the ideal setup. Switzerland simply turned that piece of pet-care wisdom into binding rules.

Somewhere near Zurich, a guinea pig once had a job description: professional friend.

The evidence

  1. 1Mental Floss: It’s Illegal to Own Only One Guinea Pig in Switzerland
  2. 2The World from PRX: Rent a Guinea Pig in Switzerland
  3. 3BLV: Nager
  4. 4Now I Know: Companion Companion

How WTF is this?

Drag the slider and tell us how much this fact blew your mind.

5

🎃 The golden pumpkin! Here is your secret Halloween fact:

The first jack-o’-lanterns were turnips. In Ireland and other Celtic regions in the 19th and early 20th centuries, people carved faces into turnips, sometimes potatoes or beets, and put a candle inside. It was meant to keep away the restless spirit “Stingy Jack”, who was barred from both heaven and hell. The National Museum of Ireland in County Mayo still keeps a plaster cast of a carved turnip from Donegal with “a pinched angry face”.

Source: Smithsonian Magazine