Nature Food Duck Fillet Dog Treats are primarily made of duck, with some variations indicating different percentages and additional ingredients depending on the specific product line. For example, some versions contain 97% duck meat, while others list ingredients such as potato starch, sorbitol, glycerin, and pea protein. These treats are typically marketed as being gluten-free and made from 100% natural ingredients, with no artificial additives or preservatives.As a pet food product, the treats do not contain common food allergens for humans. However, the main allergen risk for dogs is the duck meat itself, which, while considered a “novel protein” less likely to cause a reaction than common meats like chicken, can still cause allergies in some dogs. The product is often recommended for dogs with food sensitivities or allergies to more common protein sources. If your dog is allergic to poultry, it is best to consult your veterinarian before feeding this treat.