The theft occurred just before the opening of the exhibition when unknown perpetrators broke into the exhibition space in Kødbyen in central Copenhagen, the artist himself announced in a press release that Danish TV2 has taken part of.
The break-in was discovered by the cleaning staff who immediately alerted the police.
The art project "And now you care" includes three sick piglets that were actually meant to be put down, which Evaristti stopped feeding to let them starve to death. For three days, they get water but no food.
Visitors are also offered the opportunity to end the piglets' suffering themselves with a bolt gun.
The project is a critique of Denmark's pig production, where sows give birth to so many piglets that there is not enough milk for all, and many piglets therefore starve to death, and Evaristti wants to get Danes to boycott this type of pig production, writes Sydsvenskan.
Every day, over 20,000 piglets die. We're not counting those that are slaughtered. And now you care. Because of three little piglets, says Marco Evaristti to Danish Radio.
The animal protection organization Anima has reported the exhibition to the police. Even Denmark's largest animal protection association, Dyrenes Beskyttelse, says that they will report to the police when the piglets' suffering is deemed so great that it goes against the legislation, according to Politiken.