http://www.newsweek.com/inca-guinea-pigs-ritual-sacrifice-jewelry-1392942

One hundred ritually sacrificed guinea pigs dressed up in jewelry have been discovered at an Inca archaeological site in Peru. The rodents were found to have been adorned with earrings and necklaces, and some of them wrapped up in tiny rugs—the first time such a find has been made.

The Inca civilization is known to have sacrificed animals, and Early Spaniards arriving in South America reported the mass killing of different species, including guinea pigs. Indeed, reports suggest hundreds of guinea pigs would be killed in a single ceremony. However, archaeological evidence of this specific practice has been lacking.