According to ABC, Business Services Minister Gail Gago said the public can now vote on five proposed designs, one of which will go on cartons to identify free-range eggs on supermarket shelves.

"When South Australian shoppers buy their free-range eggs, they want to be assured about what they are spending their money on," Ms Gago said.

"The new trademark design will differentiate which eggs comply with the upcoming voluntary industry code."

Kangaroo Island producer Kathy Barrett welcomed the move to develop an industry code but said the logos bear little resemblance to an industry-developed design.

"They don't come anywhere near close to what the free range producers had requested in the original discussion," Ms Barrett said.

"We originally had a logo designed with the free-range producers that were stocking 1,500 hens per hectare or less," she said.

"In our original discussions with then minister John Rau about getting a South Australian standard set up, we requested that the logo should be kept similar to the one we had been using as the consumer had become aware of this logo."

Ms Barrett said producers were frustrated as there had been no contact from Minister Gago since she took over the Business Services and Consumers portfolio earlier this year.

She said producers will try to contact the department over the logo designs, but in the meantime will be voting to voice their disappointment.

Ms Gago said while the free-range egg code is still being finalised, South Australians can vote on the logos either at the Taste SA pavilion at the Royal Show, or through the YourSAy website.