Had a quick look online, the fish4dogs website says that it has no preservatives, however, they surely must preserve the fats to stop them going rancid, and give it a half decent sell by date-
some manufacturers use mixed tocopherols (Vitamin E) which is a preservative, I'm not sure what fish4dogs do, if you want to be sure, its best to ring and ask them straight!
If you do what you've always done, then you'll get what you've always got

I phoned and spoke with the nurse and she was quite emphatic that F4D's does not contain Ethoxyquin. The fish goes from the boat to filleters then straight to the manufacturers, who make food for 3 dog food companies, and nothing is added at any point along the supply chain. She said that the company were very devoted to an additive free food.
I found them very helpful. The son of the company directors often attends the Champ shows and he is pretty clued up on it as well and would be happy to answer all questions. The vet nurse told me to have a word with him at the shows they attend.
I may well call them again tomorrow and question why they have been evasive when other people have asked about Ethoxyquin.

My friends veteran male developed celulitis after going onto the food, he ended up with swellings on his rear, taken off the food he recovered, so there seems to have been something in it that disagreed with him. he is normally Barf fed with a bit of complete if they go away, mainly Autarky. My friend tried it wanting to encourage her puppy to eat better.
Barbara and the Grey Curly Tails.

When I spoke with them they aid that the fish was taken from the suppliers to be filleted etc. They collected the bits that the manufacturers of human food didn't want, frozen and took it to their manufacturer who produces complete for 3 dog food companies. I still wonder though what goes in as a preservative when it is being processed as surely something has to be added.
I have asked this question but never received a specific reply and am wondering why.
Has anyone else heard of dogs having developed problems on this food?