Looks like I haven't been open enough with the cause to Vili's death, so here it is also in English so that people don't need to gossip.
Vili had pancreatic inflammation caused by cancer. He was put down two months after the first symptoms because the response to treatment wasn't as hoped for. Afterwards he was sent to autopsy. Autopsy report revealed pancreatic cancer (adenocarcinoma) that had spread to the surfaces of many internal organs, lungs and abdominal cavity.
If you people want to label Vili and all his relatives with enormous cancer risk, go for it if it makes you happy.