Tribbles: fact or fiction?

If, after seeing this picture, you still have any doubts about the existence of this fascinating species, get more evidence at http://www.baselbietermeerschweinchen.ch/. And don't believe them when they say it's just guinea pigs--we all know it's a conspiracy to cover up the tribble breeding program.

In the meantime, please seal all the exits and protect your cereal boxes.