Both NUTRO and NUTRO ULTRA dog foods are made with non-GMO ingredients†, start with a high-quality protein source as the first ingredient, and are formulated without artificial flavors, colors, or preservatives. NUTRO ULTRA recipes feature a trio of high-quality protein from chicken, lamb, and salmon and an exclusive superfood medley of 15 vibrant superfoods like coconut, chia, kale, and blueberries. (†Trace amounts of genetically modified material may be present due to potential cross-contact during manufacturing)