Barnett said unlike Fonterra, smaller exporters did not have the balance sheets to write the episode off as a bad experience.
"For them, it's not really a case of who was wrong and who was at fault - it's how quickly can I get back into the market, to rebuild my networks and do something about the trust and confidence that these people did have in my brand."
Nutricia Australia New Zealand general manager Corine Tap said the company was considering whether it would seek compensation or pursue legal action against Fonterra or AgResearch.
The company recalled all of its Karicare Stage 1 new baby formula and Karicare Gold+ Stage 2 follow on formula products this month.
The recall was later narrowed to batches manufactured between May 21 and August 2 this year.
Tap said the company's own testing had always shown the products were safe and had no botulism contamination.
The company had recalled about 67,000 tins of formula as a precaution.
Its products were now back on New Zealand shelves.
Kerry Underhill, Fonterra's group director of communications, said the co-operative had been talking to its customers, but that it was too early to comment on the legal issues.