Ethoxyquin is a pesticide that is used in dog food. It is a preservative that helps prevent fats from going rancid. It can be found in most commercial dog foods, but some pet owners want to avoid it for various reasons.
The FDA does not require manufacturers to list ethoxyquin on their labels, so it’s impossible to know how much is in your dog’s food unless you test it yourself. This is why many people choose to avoid ethoxyquin-containing foods altogether.
Ethoxyquin has been linked to liver damage and cancer in rats and other animals, but there are no studies showing it causes similar problems in dogs. Dog owners who are concerned about ethoxyquin and their dog’s health should consult with their holistic veterinarian before changing their dog’s diet or adding supplements.