Consumer New Zealand wants the government to step in and regulate the free-range egg industry after reports emerged claiming caged eggs were being sold as free range.
The Serious Fraud Office (SFO) has confirmed it is investigating.
The Newsroom website is reporting this morning that millions of caged eggs were sold by Palace Poultry as free range.
Countdown supermarket has pulled Palace Poultry eggs from its shelves as a result.
Consumer New Zealand spokeswoman Jessica Wilson said there needed to be more scrutiny either by the retailers which sold the eggs or the Ministry for Primary Industries should carry out certification when it undertook checks on farms.