Back to Q&A Back to Hill's Science Diet Adult Large Breed Chicken & Barley Recipe Dry Dog Food Hill's Science Diet Adult Large Breed Chicken & Barley Recipe Dry Dog Food Does science diet use GMO ingredients? Answer This Question Answer this question Choose a nickname Add Photo 6 images max, 5MB max per image Submit Answer Cancel Terms and Conditions Showing 1 Answer The manufacturer cannot guarantee that all ingredient are GMO free. By on Sep 2, 2018 Report 33 You liked it! Something went wrong. Please try again later.