WARNING - video contains graphic content.
Shocking new footage has emerged of pigs at the same Levin farm exposed by TVNZ's Sunday programme more than a year ago.
The animal welfare group, Open Rescue, went undercover at Colin Kay's farm on the weekend and again filmed distressed and unhealthy animals.
Now Colin Kay has been investigated by MAF before and this new footage has sparked a fresh investigation.
So why has nothing changed?
Mike Hosking talks to Hans Kreik from SAFE and Sam McCivor from the Pork Industry Board.