When we were in Peru, guinea pig was served on several occasions. I passed. There's a photo at the link, thoughtfully provided by Jeff Meyerson.
Jeff now sends a further update with video. Click here.
Guinea pigs are dressed up for dinner | Metro.co.uk: "Two Guinea pigs, wearing Peruvian local dresses, are displayed during the Guinea pig food (sic).
Guinea pigs are native to the high Andes, and have been an important source of protein for millennia.
Nowadays, in Peru, the animal is served with a generous portion of Andean tubers."