The problem was lack of New Zealand grown beef, she said.
"As with many other New Zealand export products, beef is very much about supply and demand.
"If there is a tight supply and high global demand for New Zealand beef, then that can impact the amount of local beef that we're able to access for our customers here."
Last year the company sourced 100 per cent fresh chicken, pork and lamb from New Zealand with 99 per cent fresh seafood, Ms Porter said.
One customer, Rhonda White , told the Times-Age it was odd and she hadn't noticed she was buying an Australian product.
"I just assumed because it was fresh meat it was made in New Zealand. I don't think we should be doing this," she said.
"Our farmers work hard and we should be supporting them by buying Kiwi made only."
Federated Farmers Wairarapa president Jamie Falloon said it was disappointing to see Australian meat in supermarket freezers as New Zealand needed to be supported by the community.
"You can't blame the consumer going for cheaper products but they need to support our farmers. If you pay good money you expect quality; it's just disappointing for farmers to see imported products on shelves."
But there needed to be the same rules for producing food that Kiwi farmers had to adhere to, he said.
"The real challenge is that there needs to be a level playing field. Pork has been imported cheaply from countries where sow crates are used.
"From 2015 our pork has to be free range in New Zealand."
However, Kiwi meat was exported around the world, so we couldn't moan too much, Mr Falloon said. "You can't have it both ways," he said.
