Australia's leading consumer group Choice says there is an urgent need for a clear national definition of 'free range' and tighter regulation of the egg industry.
A Choice investigation has revealed some unsettling information regarding the freshness and quality of eggs across Australia.
Choice has discovered that when it comes to buying eggs what you see is not necessarily what you get and people who pay extra for eggs deemed to be free-range, free from antibiotics and hormones, may be misled by such marketing.
Choice researchers tested eggs sold at Coles and Safeway stores in Melbourne, Sydney, Perth and Brisbane.
They found that 36% of the 700 free-range, barn-laid and cage eggs tested were "weak and watery", and fell below an international benchmark for quality and freshness called a Haugh test and furthermore, tests results revealed there was little difference in freshness between free-range, cage and barn-laid eggs.
Choice says free range eggs may evoke a romantic idea of happy 'chooks' roaming in lush green paddocks when in fact half the free-range eggs sold in Australia are produced on an industrial scale and some come from flocks of up to 120,000 birds.
These hens often live in huge sheds and may never access the outdoors and their eggs come off conveyor belts.
Although more than a third of the eggs were deemed stale, Choice says this was an improvement on a 2004 test, which revealed that 53% of free-range eggs had failed to meet standards.
Choice says barn-laid eggs, provided they are certified by the RSPCA, meet humane standards, while claims that eggs are free from antibiotics and hormones mean very little.
It seems that hormones ceased being used in chicken and egg production in the 1960s but cage birds are routinely given antibiotics for disease prevention, previous research however has claimed that these antibiotics do not enter the eggs.
The other option of course is to buy certified organic eggs - Choice says check the labels - or go to smaller local shops or markets to find eggs with independent free-range certification.