Denmark to dig up thousands of dead mink after carcasses emerge from mass graves
Denmark will dig up 1000s of dead mink culled to prevent spread of the coronavirus, after animals started to rise out of their mass graves.
100s of dead mink emerged from burial sites. Gas used to kill them may have caused carcasses to swell & resurface.

https://www.cnn.com/2020/11/30/europe/denmark-dead-mink-dug-up-scli-intl/index.html