[jp4m2]

Your correct the fish supplier has to get a Special Permit......

.....it appears that fish meal suppliers (and pet food manufacturers purchasing fish meal) COULD request a Special Permit to use a natural preservative alternative (other than ethoxyquin). The ‘could’ of course is left up to the fish meal supplier and the standards of the pet food line. Many pet foods told me they require fish meals to be ethoxyquin free.

The provision to request an alternative preservative to ethoxyquin is there, the fish meal supplier just has to apply for it. We can assume this is the case with pet food companies (and/or their fish meal suppliers) that use Naturox or other naturally preserved fish meals.