That took a while to find out but i'm happy to say that fish4dogs guarantees their food does not contain ethoxiquin
Fish Super Premium Complete 4 Puppies, No additives**No preservatives**No wheat or gluten*
Ingredients
Cod 34%, Potato 21.3%, Herring Meal 26.5%,
Salmon Oil 9.6%, Beet Fibre 5.2%, Brewers Yeast 2.0%, Minerals 0.8%, Vitamins 0.6%
*
Nutritional Analysis: Protein 30%, Oil 14%, Ash 8%, Fibre 2%, Vitamin A 20,000 iu/kg, Vitamin D3 1,200 iu/kg, Vitamin E 130 iu/kg , copper 18 mg/kg
Calories 357 Kcal/100gm